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1241 LOGIC ANALYZER SERVICE MANUAL

1. OE M Cus sss lt III WIDTH yes HLIN Viste d e 512 453 5 HIGH VOLTAGE GRID VOLTAGE GENERATION R533 RSF 2 A EL uds 2 pee en MUNDI PEE 3 470K 470K ees 5 21 z w R452 XNOT COMPONENTS T512 ARE 4 5255 psa R540 Tesese REPLACEABLE AS AN ASSEMBLY REFER BOVA R535 TK 0 THE REPLACEABLE ELECTRICAL PARTS Cere 2SM IW Iw List A 5 2 C547L 10545 VRS3 FOCU T VRSIO WS 2 Y siv d ee BLUE o Eee css 42v 3 TOTAL JRGIB YRS30 13 SH 2632 30V Wark isove 4 1 9218 TPS24 WESS 4 4 TANT j MCIBIIN V ACR528 c37 C425 E 1 cs48 Er csee TPESO 4 ao R324 F 04208 VRBO ioosr oF 35 E A TLOTZ 82 Vg icd A HEN 44275 115 R431 7 94K BRT 4 9 GOV c 331 e 5 gt V 4225 4 P3 CRB2S E T435 C S43 y R327 NOTE 1 d ges REC CE 4 ROGS Loc ARC SHIELD NOTE 2 Et 19K E fov L2K EN 100 y y Y CR 332 1 i CROCI CYCLE i 5 lt gt wR428 CONTROL 2 CRIZ 4 4 2 212 25Ve 5 2 s
2. 124001 Electrical Specifications 124002 Electrical Specifications Extender Limitations 1241 Environmental Specifications 1241 Physical Specifications Display Mode Truth Table Required Test Equipment Specifications Tested in the Part 1 Performance Checks Power Supply Readings Power Supply Readings Recommended Servicing Approach Static Damage Table Possible Components Damaged When a Board is Installed Incorrectly P Signatures CPU Buffers and Decoders I O P Signatures Decoders and Buffers Outputs P Signatures ROM Data Lines Con P Signatures CPU Buffers Decoders and ROM Diagnostics Version 9 0 Con P Signatures ROM Data Lines Diagnostic Code Location 5 12 8 31 1241 SERVICE ADDENDUM OPERATOR S SAFETY SUMMARY The general safety information in this summar
3. PROCEDURE 9 1241 CRT amp COLOR SHUTTER REMOVAL Disassembly uruya ic leaded doe pl Installation Hints MAINTENANCE INTRODUCTION TOOLS REQUIRED FOR MAINTENANCE MAINTENANCE PRECAUTIONS a E EE Light Emitting Diodes LEDs Static Precautions PREVENTIVE MAINTENANCE Exterior Cleaning Interior Cleaning Cleaning Guidelines HIE TROUBLESHOOTING AND REPAIR OVERVIEW E E EE N TROUBLESHOOTING EQUIPMENT USING THE 1240 EXTENDER BOARDS REPLACING DEFECTIVE PARTS LIST OF ASSEMBLIES TROUBLESHOOTING PRECAUTIONS Discharging The CRT Static Discharge Damage Special Handling Required Operating The 1241 With The Cabinet Removed v lt u so lt 5 Page 6 2 6 2 6 3 6 3 6 3 6 4 6 5 6 5
4. LLL L Ll 4 lon CH2 GND Figure 8 4 A13TP340 Q534 gate drive A13TP456 horizontal flyback GND CH2 GND Figure 8 5 A13TP340 0534 gate drive A13TP534 transformer flyback 8 21 Troubleshooting and Repair 1241 Addendum 8 22 CH1 GND CH2 GND Figure 8 6 A13TP344 Q334 gate drive A13TP340 Q534 gate drive CH1 GND Lal titty tty ELI 5378 27 Figure 8 7 A13U218 4 sawtooth input A13TP225 HDRIVE L CH2 GND 1 L HAMRE __ MI iL I 5378 28 Figure 8 8 A13TP223 horizontal oscillator A13TP225 HDRIVE L CH1 GND CH2 GND Troubleshooting and Repair 1241 Addendum EENES ARN Lee IP 5378 65 Figure 8 9 A13TP650 cathode Z axis amplifi er A13TP225 HDRIVE L CH1 GND CH2 GND hn e T Arb w w DE 5378 66 Figure 8 10 A13J200 1 and J200 2 color shut ter drive A13TP148 vertical flyback CH1 GND CH2 GND O L al I 5378 67 Figure 8 11 A13J200 3 color shutter drive A13TP148 vertical flyback CH2 GND REV JAN 1986 8 23 Troubleshooting and Repair 1241 Addendum Cw ome NU CH1 GND
5. 8 220 OHM 22 0 125W RES FXD FILM 220 OHM 5 0 25W RES FXD FILM 220 OHM 5 0 25W RES NIWK FXD FI 7 68 0HM 202 0 1254 RES NIWK FXD FI 5 68 0HM 22 1 5 W RES 1 5 68 OHM 22 1 5 W RES 7268 OHM 202 0 125W RES 7268 OHM 20 0 125W RES 68 OHM 5 0 125W RES FXD FILM 68 OHM 5 0 25W RES NTWK FXD FI 7 68 0HM 202 0 125W RES FXD FILM 68 OHM 52 0 25W RES FXD FILM 1K OHM 5 0 25W RES FXD CMPSN 100 OHM 52 0 125 RES NTWK FXD FI1 6 180 6 270 OHM RES NTWK FXD FI 7 68 202 0 125 RES NTWK FXD FIT 7 68 20 0 125 4 RES FXD FILM 180 0HM 52 0 25W RES FXD FILM 100 0HM 52 0 25W RES FXD FILM 200 OHM 5 0 25W RES FXD CMPSN 68 OHM 52 0 125W RES NTWK FXD FI 7 68 OHM 202 0 125W TERMINAL PIN 0 365 L X 0 025 TERMINAL PIN 0 365 L X 0 025 PH TERMINAL 0 365 L X 0 025 PH TERMINAL 0 365 X 0 025 PH TERMINAL PIN 0 365 L X 0 025 PH TERMINAL PIN 0 365 X 0 025 PH TERMINAL 0 365 L X 0 025 PH TERMINAL 0 365 L X 0 025 PH Mfr Code 5 668 5 668 01121 5 668 91637 91637 5 668 01121 5 668 5 668 91637 01121 32997 01121 01121 91637 9163 7 91637 91637 19 01 5 668 5 668 5 668 5 668 91637 91637 57668 91637 91637 57668 57668 91637 91637 91637 91637 91637 01121 5 668 91637 57668 57668 01121 91637 91637 91637 57668 57668 5 668 01121 91
6. DI 1UF 80 20 25V 18796 RPE11375U01052750V 13 127 283 0100 00 DI 0 0047UF 10 200V 04222 SR302A472KAA Al3C133 283 0479 00 CAP FXD CER DI 0 47UF 80 202 25V 20932 501 5250 4742 13 138 283 0479 00 DI 0 47UF 480 202 25V 20932 501 ES25DP4747 13 139 290 0301 00 ELCTLT 10UF 102 20V 31433 1108 106 020 5 4 281 0812 00 CAP FXD CER DI 1000 10 100 04222 SA101C102KAA 9 18 REV JAN 90 Tektronix Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number A13C148 281 0819 00 CAP FXD CER 01 33 5 50 04222 SA102A330JAA 13 152 285 0808 00 0 10 10 50 04099 16 13 153 285 0808 00 PLASTIC 0 1UF 102 50V 4099 EK13 16 AL3C168 285 0808 00 CAP FXD PLASTIC O 1UF 10 50V 04099 EK13 16 AL3C201 283 0789 00 CAP FXD MICA DI 600PF 12 500V 09023 CD15fFC601F03 13 202 283 0177 00 DI 1UF 80 20 25V 18796 RPE11375U0105Z50V 13 204 283 0555 00 CAP FXD MICA DI 2000PF 12 500V 09023 CD19FD202F03 13 205 283 0555 00 DI 2000PF 12 500 09023 CDI9FD202F03 13 213 283 0789 00 DI 600PF 12 500V 09023 CD15FC601F03 13 214 283 0177 00 DI 480 20 25 18796 RPEI11375U0105750V 13 215 283 0177 00 DI 1UF 80 202
7. DI 0 047UF 480 208 50V 04222 MDO015b4737AB AL5C460 283 0422 00 DI 0 047UF 480 202 50V 04222 MD015E4737AB A15C470 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E47374B AL5CA75 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E4737AB AL5C480 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E4737AB AL5CA90 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E4737AB 15 510 283 0422 00 CER DI 0 047UF 80 20 50V 04222 MD015E4737AB Al5C515 283 0422 00 DI 0 047UF 80 20 50V 04222 015 4737 AL5C535 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E47374B AL5C538 283 0422 00 CAP FXD CER D1 0 047UF 80 201 5OV 04222 MD015E4737AB AL5C565 283 0422 00 DT 0 047UF 80 204 50V 04222 MD015E473748 15 575 283 0422 00 DI 0 047UF 80 20 50V 04222 15 4737 15 608 283 0422 00 DI 0 047UF 80 202 50V 04222 0015 473 15 618 283 0422 00 01 0 047 80 20 50 04222 15 4732 15 695 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E4 37AB AL5CR250 152 0141 02 SEMICOND DVC DI SW SI1 30V 150MA 30V 10 35 07263 1N4152 9 30 REV JAN 90 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr
8. 01 0 047 80 20 50 04222 MD015E4737AB 16 312 283 0422 00 DI 0 047UF 80 202 50V 04222 1 4737 16 315 283 0182 00 DI 51PF 52 400V 04222 SR208A310JAA 16 316 283 0182 00 DI 51PF 52 400V 04222 SR208A310JAA 16 320 283 0154 00 01 22 5 50 187 RPE110C0G220J050V Al6C321 283 0154 00 CAP FXD CER 01 22 5 50 18 96 RPE110C0G220J050V Al6C329 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E473ZAB Al6C333 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 M0015E47374B A16C339 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E47374B Al6C340 283 0422 00 DI 0 047UF 80 202 5ON 04222 15 4 3 16 47 283 0422 00 DI 0 047UF 80 202 5OV 04222 MD015E4737 4B Al6C354 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E47374B Al6C359 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015t4737AB AL6C364 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015 473ZAB Al6C402 283 0422 00 01 0 0470 80 20 amp 50 04222 MD015E473ZAB Al6C404 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MDO15bE4737AB 16 410 283 0422 00 DI 0 047UF 480 202 50V 04222 MD015E473 AB Al6C418 283 0422 00
9. 8 51 14669 10453 fils T _ I po m pe ae 3 sas 5 sein szin evi Sein N szin e id _ L o e 91 leen jee leen Rond Ps Me e _ RW TN o qM E RES x ER Claw seme a Am en 7 ki sez M FT Pe ys x1 j E sen szzr eez 1 il B 1 1 2 4 E y m Wm n i aen x JE IL yey ES E 1 r i EIN NOILVOO1 LN3NOdWOO Troubleshooting and Repair 1241 Addendum 8 52 module DISPLAY area RAM DISPLAY RAM AREA TEST DESCRIPTION Since the display RAM has all of the current screen data in it its contents must be saved before the RAM test is run The 4K of display RAM is set up in two parts the Green RAM A12U245 and the Red RAM A12U145 The Green RAM contains all the data displayed in green and the red RAM contains all the data displayed in red Data that will be displayed in yellow is stored in both the Red and Green RAMs All the Green RAM is saved in system RAM locations B350nex through BB50 e Not all of the data stored in the Red RAM is saved there is not enough room in the system RAM to accomodate all of
10. 10100 1 0o INR 130u2S 118H eZiwirovi t gu 4 LNO O3QIA wA H 3QOW1S 300 naso nouo 1 Li RR HIN IIVO l TNOU D INASI 6 02 0 HOLA oe J wor Tos Fas oa coroas i 28 055320 2 WNOd 47D t eave Wed 03H 3 3SHSARY WVYSVId 2018 AVTdSIG 8 63 Troubleshooting and Repair 1241 Addendum 8 64 module DISPLAY area RVIDEO REVERSE VIDEO AREA TEST DESCRIPTION The reverse video circuitry is verified using the diagnostic window A10U295 and U190 When the I O Processor reads a standard video pixel from the diagnostic window it has a binary value of 1 A reverse video pixel is read as a binary value of O First a reverse video space character is written to the character position in Display RAM that contains raster 200 character line 25 Next the test waits for one 60 Hz interrupt prior to reading the diagnostic window This synchronizes the reading of the diagnostic window register with the updating of the register by hardware When the interrupt occurs the diagnostic window register is read expecting a value of FO e Next the 9 8 MHz clock is inverted and the diagnostic window reg ister is read again It should contain FOnex 3410 Error Index Explanation Before each read of the diagnostic window a 60 Hz interrupt must
11. 9 s R v 1241 SERVICE ADDENDUM a 9 gt E 3 1 3 2 3 2 rss ma OUS 3 2 s 4 10 1241 SERVICE ADDENDUM Section 5 TABLE OF CONTENTS cont DISPLAY BOARD THEORY tee tui seg cat Deas ae Clock Divider ais oie 35 yee a VOP Select LOGIC ne nas eee CAs cons VOP RAW Control EE Arne m RAM Interface Sync Signal Generation Raster Counter And Vertical Scrolling Control Horizontal Scrolling Control Display RAM And Address Multiplexing Display Mode Control VERIFICATION AND ADJUSTMENT PROCEDURES INTRODUCTION E dd ne USING THE 1240 EXTENDER BOARDS OPERATING THE 1241 IN THE SERVICE POSITION Proper Cooling Of The 1241 Timing Limitations FUNCTIONAL CHECK PROCEDURES PERFORMANCE VERIFICATION PROCEDURES IIFOdUCHO D eere s edd a Rie dames Part 1 Supply And TPG Performance Checks Procedure 1A B Power Supply Performance Check Procedure 2 Display High Voltage
12. iud AY 1dSiQ 5921 Sren srin tme vv c 1nox2o1 ad 5131110825 LIBH 2 5020 odd Z707 OUa 173352 Soin HINTSUSY bee 0 60 JOH1NOO Hives 61 5 tz Hg 6 ozen HHOLVIA Bl i 300W19 100 O3GiA ONIN 19 Me S HIJOS JNA HIFGOWL 61 HZ HANG 6 S GUUS w39 320m ax3tHiax3 09 uOSS32O0td S 9NILLHOTTHOIH WVYOVIG X90178 14610 ea Tere 95 HIN33uS SAITO Or have 82 SS cm cn cd VOH ee 4 1 ZwroOvi CUM t i uwa y 31350 02 t CUWOu2 2NASO 4 4 1 8 65 Troubleshooting and Repair 1241 Addendum 8 66 module DISPLAY area HIGHLIGHTING HIGHLIGHTING AREA TEST DESCRIPTION The highlighting circuitry is verified using the diagnostic window A10U295 and U190 Prior to reading the diagnostic window it is necessary to wait for a 60 Hz interrupt This synchronizes the reading of the diagnostic window register with the updating of the register The test first writes a highlighting space character to the diagnostic window location in Display A12U145
13. 315 0241 00 RES FXD F1LM 240 0HM 52 0 25W 19701 240 5 0 25 A13R183 315 0151 00 RES FXD FILM 150 0HM 5 0 25W 57668 150 5 0 25w REV JAN 90 9 21 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number AL3R185 321 0108 00 RES FXD FILM 130 OHM 12 0 1254 TC TO 91637 CMF55116G130R0F AL3R186 321 0774 00 RES FXD FILM 4 5K 12 0 125 TC TO 91637 CMF55116645000F AL3R187 315 0222 00 RES FXD FILM 2 2K OHM 5 0 25W 57668 2200 5 0 25w AL3R202 315 0300 00 RES FXD FILM 30 0HM 52 0 25W 19701 30 5 0 25w AL3R203 321 0273 00 RES FXD FILM 6 81K 0HM 12 0 125W TC TO 91637 CMF55116G68100F AL3R204 321 0335 00 RES FXD FILM 30 1K 0HM 12 0 125W TC TO 91637 CMF55116G30101F AL3R211 321 0273 00 RES FXD FILM 6 81K OHM 12 0 125W TC T0 91637 CMF55116C68100F AL3R212 321 0335 00 RES FXD FILM 30 1K 0HM 12 0 125W TC TO 91637 CMF55116G3010 F AL3R213 315 0300 00 RES FXD FILM 30 OHM 52 0 25W 19701 30 5 0 25w AL3R214 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 5 668 1000 5 0 25w AL3R215 321 0215 00 RES FXD FILM 1 69K 0HM 12 0 125W TC TO 91637 CMF55116616900F AL3R216 321 0235 00 RES FXD FILM 2 74K OHM 12 0 125W TC T0 91637 MF55116G27400F A3R217 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 57668 1000 5 0 25w AL3R218 315 0123 00 RES FXD FILM 12K OHM 5 0 25W 57668 12K 5 0 25w A3R219 8 315 0680 00 RES FXD FILM 68 OHM 5 0 25W 5766
14. DOES J200 PIN 4 HAVE A 20 VOLT 1 9KHz SQUARE WAVE YES FIG 8 12 DOES U138 PIN 15 HAVE A 15 VOLT WAVEFORM SIMILAR TO THAT IN FIG 10 SUSPECT U138 YES Figure 8 2 1241 CRT Drive Board troubleshooting tree cont TROUBLESHOOT COLOR SHUTTER DRIVER SUSPECT VR126 CR125 Q100 Q102 CHECK THAT U123 PIN 6 HAS 12 VOLTS SUSPECT U123 SUSPECT VR116 115 0110 0112 U117 PIN 6 HAS 12 VOLTS SUSPECT U117 CHECK 5 VOLT SUPPLY RUN REV DEC 1989 Troubleshooting and Repair 1241 Addendum 6b TROUBLESHOOT COLOR SHUTTER DRIVER CONT 15 DOES ARE Qi u 2 LTS U134 PIN 17 PULSEDO NO YES NO NO YES DOES CHECK CIRCUIT CHECK U138 PIN 20 CONTINUITY FROM 5VOLT SUSPECT YES SUSPECT U138 TROUBLESHOOT HIGH VOLTAGE CIRCUIT RECONNECT ANODE TO CR337 CHECK FOR YES CRT VOLTAGES CHECK ANODE 10 14KV CATHODE Z AXIS TP630 60 70V AMPLIFIER TP636 60 70V CHECK THAT Q534 AND Q334 ARE NOT SHORTED TO THE HEAT SINK APPLY 6 lt lt 6 5 VOLTAGE APPLIED BETWEEN R203 amp R204 CONNECT REFERENCE SIDE TO TP210 CAUTION A es DO NOT ALLOW TP205 TO FALL REDUCE V BELOW 5 5 VOLTS Figure 8 2 1241 CRT Drive Board troubleshooting tree cont 8 17 Troubleshooting and Repair 1241 Addendum SUSPECT NO 0237 0238 TP238 THE U236 S
15. CH2 GND 5378 68 Figure 8 12 A13J200 4 color shutter drive A13TP148 vertical flyback CH1 GND CH2 GND 5378 69 Figure 8 13 A13U138 11 VDRIVE GREEN H A13U138 12 VDRIVE H 5378 70 Figure 8 14 A13U138 12 VDRIVE H A13TP148 vertical flyback 8 24 REV JAN 1986 Troubleshooting and 1241 Addendum PROCESSOR LEDS Four LEDs on the I O Processor Board board asssembly A10 and six LEDs on the Control Processor Board board assembly A9 track the progress of the power up diagnostic tests When the 1241 is powered on the kernel circuit verification tests begin to run simultaneously on the I O and Control Processors As each step of the kernel verification tests successfully proceed the status is recorded in these LEDs When a failure is detected the step at which the failure occurred remains displayed on the LEDs For more specific troubleshooting information refer to the appropriate processor s LED error index in this Troubleshooting and Repair section KERNEL SIGNATURE ANALYSIS If neither the 1241 display nor the processor LEDs are operational the technician has available an additional troubleshooting aid By removing the hardware strap and associated resistor pack on either processor board he may isolate the CPU Central Processing Unit from the ROM and RAM This operation places the CPU in a forced NOP no operation loop that increments the address lines each time the CPU executes
16. 0 1 S 05574 600201 3208 13 131 2401 00 1 CONN RCPT ELEC 2 X 25 MALE 483 082 2543 5010 14 131 0608 00 12 TERMINAL 0 365 L X 0 025 PH BRZ GOLD 22526 48283 06 COMPONENT KIT DIAGNOSTIC ROM PACK 15 200 2503 01 1 PACK TOP ABS SMOKE 80009 200 2503 01 ATTACHING PARTS 16 211 0012 00 4 SCREW MACHINE 4 40 X 0 375 PNH STL 93907 ORDER BY DESCRIPTION END ATTACHING PARTS 18 136 0751 00 4 OKT PL IN ELEK DIP 24 PIN 2 X 12 0 6 X 0 09922 DILB24P108 19 337 3122 00 1 SHIELD ELEC STATIC 80009 337 3122 00 20 200 2504 01 1 PACK BOTTOM ABS SMOKE TAN 80009 200 2504 01 21 670 7703 07 1 CIRCUIT BD ASSY 18 CHANNEL ACQUISITION 80009 670 7703 07 124002 ONLY 22 105 0160 04 2 EJECTOR CKT BD YELLOW PLASTIC 80009 105 0160 04 23 214 1337 00 2 PIN SPRING 0 25 X 0 103 OD STL CD PL TKO858 ORDER BY DESCRIPTION 24 136 0757 00 3 SKT PL IN ELEK MICROCIRCUIT 40 DIP 09922 DILB40P 108 25 131 2567 00 2 CONN RCPT ELEC CKT BD RTANG 17 34 CONT 22526 65461 06 26 131 0608 00 50 TERMINAL PIN 0 365 L X 0 025 PH GOLD 22526 48283 0 27 214 0579 00 3 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION 010 6460 01 2 PROBE DATA P6460 80009 010 6460 01 SEE 070 4345 00 MANUAL FOR PARTS BRKDN 28 670 7524 09 1 CIRCUIT ASSY 9 CHAN 80009 670 7524 09 124001 ONLY 29 105 0160 04 2 EJECTOR CKT BD YELLOW PLASTIC 80009 105 0160 04 30 214 1337 00 2
17. 1 13s3u 1vNOILO3uIQIG WWOHD woud 8 921 g 082 13934 e Gp T T 641 21 ogen 9 1 fido SH344n8 0910 Ss3udav WOYO moana fag OLSN MOIIN 49019 s9sn 2 oven OVI Siva ovg Siva ova JOVIS WVYSVIG 2018 13NH33 55300 0 1 8 42 Troubleshooting and Repair 1241 Addendum KERNEL AREA ROM ROUTINE DESCRIPTION The kernel ROM routine tests for complementary bytes and a correct checksum in the diagnostic ROM A10U160 1011 LED Error Index Explanation The complementary byte test for ROM A10U160 began but did not finish Probable Cause Action Diagnostic ROM failure Suspect the diagnostic ROM A10U160 1F11 LED Error index Explanation ROM A10U160 failed the complementary byte test This test checks the bytes at 1FFChex and 1FFD e to see if they are complementary Probable Cause Action Diagnostic ROM failure Suspect the diagnostic ROM A10U160 Kernel failure Move NOP jumper A10J450 to the TEST position 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the Z80 microproces sor address data and control lines with a logic analyz er or signature analyzer and verify values listed in Kernel Signature Analysis 1010 LED Error index Explanation The ROM checksum test for
18. 16 17 74UC 17 18 30A1 18 19 P1F2 19 Where XXX denotes ROM under test 8 28 A9U347 gt 200000 G fO Troubleshooting and Repair 1241 Addendum CON P SIGNATURES CPU BUFFERS DECODERS AND ROM Clock Start Stop Location Signature Location Signature Location Signature Location Signature 0000 0005 P064 69F8 7P50 H389 P962 PUA7 6C82 HF4A 9643 U668 5655 P90H HHHA 0000 0000 0000 0000 000U 0000 000U 0008 000H 0000 0000 000U 0000 0000 0009 000U 0000 C9C2 C9C2 C9C5 C9C2 000F 000U 1 J Table 8 7 J100 1 GND J100 10 5 Volts J100 10 Indeterminate 0000 000U wh b 9 gt gt gt 4 On P G gt 9696 UUUU 258F H389 0009 7P50 P962 PUA7 P064 258C 0005 OOOF FFF2 6669 3338 CF17 0000 258F 000U 000U 000U OOOF 0005 258F 000U 000U HPU1 ASH6 000U 0000 000U 0000 0000 000U 000U 000U 000U 2A3U OPOP 000U 000U 0000 000U 9F31 000U 0001 9F31 000U 0000 0000 000U 8 29 Troubleshooting and Repair 1241 Addendum 8 30 Table 8 8 DIAGNOSTICS VERSION 9 0 CON P SIGNATURES ROM DATA LINES Clock J 9101 11 5 Volts UP73 Start 1 0233 9 GND 0000 Stop J 0233 9 Location Signature A9U135 TROUBLESHOOTING USING DIAGNOSTICS ERROR INFORMATION DIAGNOSTICS OVERVIEW With the exception of I O Processor Kernel LED Error Indexes and Display
19. 20 0 54 RES NTWK FXD FI 100 OHM 202 0 5W RES NTWK FXD FI 3 50 0HM 52 0 125W RES RES NTWK FXD FI 3 50 0HM 52 0 125W RES IC DIGITAL ECL GATE QUAD OR NOR SCRN IC DIGITAL ECL GATE QUAD OR NOR SCRN IC DIGITAL ECL GATE QUAD OR NOR SCRN CIRCUIT BD ASSY RS232C 1200001 ONLY OPTIONAL ACCESSORY CIRCUIT BD ASSY RS232C 1200001 ONLY OPTIONAL ACCESSORY DI 470PF 102 50V CAP FXD CER 01 470 10 50 CAP FXD CER DI 470PF 102 50V 01 0 10 20 50 01 470 102 50 01 470 10 50 01 0 10 20 50 01 470 102 50V CAP FXD ELCTLT 100UF 502 202 16WVDC CAP 01 0 10 20 50 DI 0 1UF 20 50 DI 0 1UF 20 50 FXD ELCTLT 47UF 50 202 LOWVDC 01 470 10 50 DI 0 1UF 202 50V RES FXD CMPSN 10K 0HM 52 0125 IC DIGITAL TTL RECEIVER QUAD RS 2320 1489 IC DIGITAL LSTTL GATES QUAD 2 INPUT OR IC DIGITAL TTL DRIVER QUAD RS 232C 1488 MICROCKT DGTL 16384 X 8 EPROM MICROCKT DGTL 16384 X 8 EPROM IC DIGITAL NMOS PERIPHERAL USART 8250B CIRCUIT BD ASSY GPIB 1200C02 OPTIONAL ACCESSORY Mtr Code 91637 01295 80009 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04
20. NN Cn Be R EF dit C z PA Pa B BR TE aa 28 oS Si egg ou BB SBE gg e RES FXD FILM 510 5 RES NIWK FXD FI 5 100 RES FXD FILM 2K OHM 5 RES FXD FILM 510 HM RES FXD FILM 510 OHM RES FXD FILM 510 HM e z g wees 22223 1N4152 1N4152 1N4152 1N4152 1N4152 1N4152 1N4152 5082 2811 PE 20943 108 0520 00 108 0520 00 MPS3565_FAMILY 2N4249_FAMILY 2N4249_FAMILY 2N4249 FAMILY 2NA249 FAMILY 2NA249 FAMILY 284249 FAMILY 284249 FAMILY 284249 FAMILY 284249 FAMILY MSP10A 01500J G OR C MSPOBA 01 101J OR G 5 01 1019 OR G MSP10401 101J OR G C MSPOBA 01 101J OR G MSP10A01 511G OR CSC 3386X 016 103 3386 1 501 5 0 25w 10K 5 0 25w CMF55116C49900F 20K 5 0 25w CMF55116DA42R0F CMF55116D200028 CMF55116C40001B MSPOBA 01 101J OR G CMF55116C20001B CMF55116C20001B 10K 5 0 25w 10 5 0 25w 3900 5 0 25w 51 5 0 25w 510 5 0 25w 510 5 0 25w MSP10401 101J OR GC 100 5 0 25w 100 5 0 25w MSP10401 101J OR G C 51 5 0 25 100 5 0 25w MSPO6A01 1D1G OR CSC MSPO6A01 1D1G OR CSC 510 5 0 25w MSPO6A01 1D1G OR CSC 2000 5 0 25w 510 5 0 25w 510 5 0 25w 510 5 0 25w 9 31 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mtr Component No Part Number Effect Discont Pa
21. R332 Fp 205 1 E 1 mun 6 42 2 VOLTS 1 V BOR 12V osc R232 E TIMING amp 2t 4 27 Soy REN Re a noes MEM 5 CR2334 E a 2 55 On ANODE Cale TP205 5 1 2 C554 1 z VOLTAGE LE R204 C g64 E 5 10O F 2 304 oco C327 P S 22k Tz 203 E lt 200 C869 z R32 gigi U207A E RSS 390 Lote 4 i 2 x i CRSSC C UK 5 E pm i CONTRAST Noy gt VN QSS58 60V vR amp 32 c20i 2 RSS7 css ROIS R562 7 9va coc 2 2 5 22 d 522 250k Et E HORIZONTAL SWEEP CIRCUIT 5 addu 2 VIDEO R565 e Aes Static Sensitive Devices ns See Maintenance Section NOTE CRT YOKE CRT PLUG NOTE 2 CHASSIS GROUND 77 NOTE 3 TABS SOLDERED TO LARGE WIRES SUPPLIED BY THROUGH E CREW MOUNT COPPER FEEDBACK CONTROL LOOP 1241 SERVICE REA AND ARE GROUNDED SEPARATE MANUFACTURERS i NOTE Table 10 1 shows _ IG Pinout VCC amp Gnd 5 CATHODE Z AXIS BRIGHTNESS CONTROL 5378 5 CRT LOCS DRIVER REV DEC 87 Table 10 3 REAR PANEL CIRCUITS CRT BOARD ASSEMBLY A13 CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION C266 B3 B3 Q275B B2 A4 C270 B2 B4 Q276 B4 A3 C271 B2 B4 Q277 C4 C274 B4 B3 R173 B3 B4 C280 B2 A4 R174 B3 A4 C565 E4 175 2 A4 C568 E4 B1 R176 C2 A4 C573 E3 B1 R179 B3 A4 C
22. Power down the instrument Using an ohmmeter check the continuity of the address lines Troubleshooting and Repair 1241 Addendum 12 8266 ino wee m Q8 055320 1NO DO1 dO 1921 2 8 aunbi4 116019 0 00 O1 2002 00 dYHMH 1000BOOY 31A8H 0000UQQOY CUT9ON9S 1i8H sezn sein 5 WOH d31INDOD HGOY 571 0 3440 0090 S 20 NWO 43420 0000 6921 59201 Sein YALIVAHOS AYISI 02401 san t0019 iHI300W19 H 30OW1 JIMOVYD eon S01 i HiN33H WH LNOD OETA M OQONUMG V3HV 9NITIOHOS TVOILLH3A WVYSVIG 2018 AV IdSIQ u3iSvu a HIS 61 t HR HW 6 ein orale m iy Ow m HOLT ca PM 300 DO duc 8 55 Troubleshooting and Repair 1241 Addendum 8 56 module DISPLAY area VSCROLL VERTICAL SCROLL AREA TEST DESCRIPTION The vertical scrolling circuitry is verified by scrolling a diagnostic character vertically through the di agnostic window A10U295 and 0190 The I O Processor then reads back a portion of the displayed video fro
23. TTL level inputs HDRIVE L and VORIVE GREEN H are used by counter A13U134 and PAL A13U138 to generate timing signals required to drive the Liquid Crystal Color Shutter LCCS The signals are buffered by A13U123 and U117 then applied to transistors A13U100 and U112 These transistors amplify and combine the timing signals to generate the AC signals required by the LCCS COMM PACK POWER SUPPLY 4 A small power supply circuit located on the CRT Drive Board provides 12 volts to the COMM Pack Port A13U465 takes the 16 volts from the instrument power supply and regulates it down to 12 volts This voltage is used by the CRT drive circuitry and COMM Packs TRIG IN LEVEL SHIFT AND BUFFER This level shifting buffer accepts TTL level trigger in signals from the rear panel TRIG IN BNC connector and converts them to buffered ECL level signals The trigger in signal is used to externally trigger or enable the 1241 Transistor A13Q275B acts as a buffer for the trigger in signal supplying the necessary current drive for transmission to the Trigger Board A13Q176 Q177 and Q178 are TTL to ECL level shift ing components If an X10 attenuation trigger input probe is used at the rear panel the probe con nector contacts the outer ring of the TRIG IN BNC This activates the threshold switch comprised of A13Q188 and Q175 effectively reducing the base drive to A13Q176 by a factor of 10 TRIG OUT LEVEL SHIFT AND BUFFER lt gt This level shif
24. The video signal from the Display Board is amplified by transistors A13Q563 and Q564 Transistor Q564 is cascoded on to Q563 which operates in a common emitter configuration The bandwidth approximately 20 MHz is set by A13C556 and L662 The screen contrast adjustment on the rear panel controls the bias voltage on grid 1 of the CRT This allows variation in the potential difference between the cathode and grid 1 thus changing the screen brightness LIQUID CRYSTAL COLOR SHUTTER AND DRIVER 4 The Liquid Crystal Color Shutter LCCS when placed in front of a monochrome CRT creates a 3 color display The LCCS consists of a liquid crystal optical switch that is sandwiched between a neutral polarizer and two color polarizers The monochrome CRT mounted behind the LCCS emits a combination of red and green light The LCCS transmits green light when a voltage is applied and red light when the voltage is removed Color images are generated by switching the LCCS so that only one image field red or green is transmitted at a time The CRT s display is synchronized with the LCCS switching so that only information to be displayed in a particular color appears on the CRT when the LCCS is set to transmit that color Any information displayed by the CRT during both the LCCS s green and red periods appears yellow Because switching takes place rapidly and repetitively only a single color image is perceived 4 9 Theory of Operation 1241 Addendum
25. 5 100 04222 SA101A201JAA 13 557 283 0107 00 DI 51PF 52 200V 18796 110 06 5102 200 AL3C560 285 0924 00 CAP FXD PLASTIC 1 7UF 10 200V 84411 120 1 7 10 200 13 565 290 0782 00 CAP ELCTLT 4 7UF 75 20 35VDC 55680 UVX1V4R7MAA A13C566 281 0820 00 DI 680 PF 102 50V 04222 5 101 681 13 56 281 0775 00 CAP FXD CER 0 20 50 04222 SA105E104MAA 568 281 0775 00 01 0 10 20 50 04222 105 1 13 569 283 0198 00 CAP FXD CER 01 0 22 20 50 18796 RPE122X7R224M050V A13C573 281 0775 00 01 0 20 50 04222 SA105E104MAA A13C578 290 0782 00 FXD ELCTLT 4 7UF 75 20 35VDC 55680 UVXIVAR MAA 13 625 285 1262 00 CAP FXD PLASTIC 0 015UF 5 400VDC 84411 TEK 264 015 5 400 A13C635 290 0880 00 CAP FXD ELCTLT LOUF 50 102 160V TKO900 SLI60VB1ORTIOX2OLL AL3CR115 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1 152 A13CR121 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1 152 AL3CRI25 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1 152 AL3CR183 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1 152 AL3CR233 152 0581 00 SEMICOND DVC DI RECT SI 20V 1A A59 04713 185817 AL3CR247 152 0581 00 SEMICOND 51 20 1 59 04713 135817 AL3CR266 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V
26. A J245 KEYBOARD 6 J200 CRT DRIVE BOARD A13 J265 J475 9 COMM PACK gt A31 A32 A33 W125 INTERFACE BOARD 08 J750 C C A C c Ic I lt lt lt lt 45 lt lt lt lt 4 65 T e e J O lt 20 2 0 0 lt Ox Ox Ox 8 lt Et Oy 20604 552 zz 25 35 95 G5 zz 009 co 5 52 Se 5 Q G ot 2 o o lt Os Os OT o 5 lt lt lt lt el s5 9 2121212 7 ce viv viv v 4620 4620 4620 2620 4620 4510 4510 9510 9510 9630 o W181 e D o e A41 A42 A43 A44 a J620 connector is used when a 9 channel card A15 is installed When an 18 channe card A16 is installed J520 is used sieis Figure 4 4 1241 cables and connections Theory of Operation 1241 Addendum POWER SUPPLY THEORY The 1241 power supply is similiar to the 670 7534 06 version of the 1240 power supply The only difference between the two is that the 13 volt line in the 1240 supply is an unregulated 16 volts in the 1241 supply The physical difference between the power supply board
27. Assembly number Circuit number Read Resistor 1234 of Assembly 23 Example b component number A23A2R1234 A23 A2 R1234 Assembly Subassembiy Circuit number number number Read Resistor 1234 of Subassembly 2 of Assembly 23 Only the circuit number will appear on the diagrams and circuit board illustrations Each diagram and circuit board illustration is clearly marked with the assembly number Assembly numbers are also marked on the mechanical exploded views located in the Mechanical Parts List The component number is obtained by adding the assembly number prefix to the circuit number The Electrica Parts List is divided and arranged by assemblies in numerical sequence e g assembly A1 with its subassemblies and parts precedes assembly A2 with its sub assemblies and parts Chassis mounted parts have no assembly number prefix and are located at the end of the Electrical Parts List TEKTRONIX PART NO column two of the Electrical Parts List Indicates part number to be used when ordering replace ment part from Tektronix SERIAL MODEL NO columns three and four of the Electrical Parts List Column three 3 indicates the serial number at which the part was first used Column four 4 indicatesthe serial number at which the part was removed No serial number entered indicates part is good for al serial numbers NAME amp DESCRIPTION column five of the Electrical Parts List In the Parts List an Name
28. Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number At5R165 15 180 AL5R181 AL5R182 AL5R183 5 184 AL5R185 5 186 AL5R190 Al5R191 AT5R257 A15R280 AL5R281 AL5R282 A15R290 AL5R291 AL5R295 AL5R300 AL5R305 AL5R315 15 322 AI5R325 A15R330 15 331 158338 AJ5R342 AL5R346 AL5R350 AL5R352 ALBR376 AL5R377 AL5R378 158379 REV JAN 90 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0322 00 119 1088 00 108 0520 00 108 0520 00 151 0341 00 151 02 00 151 0342 00 151 0342 00 151 0342 00 151 0342 00 151 0342 00 151 0342 00 151 0342 00 151 0342 00 307 0640 00 307 0489 00 307 0489 00 307 0486 00 307 0489 00 307 0503 00 311 1245 00 311 1248 00 315 0105 00 315 0103 00 321 0260 09 315 0203 00 321 0159 08 321 0414 04 321 0924 07 307 0489 00 321 0318 07 321 0318 07 315 0103 00 315 0103 00 315 0392 00 315 0510 00 315 0511 00 315 0511 00 307 0486 00 315 0101 00 315 0101 00 307 0486 00 315 0510 00 315 0101 00 307 0488 00 307 0488 00 315 0511 00 307 0488 00 315 0202 00 315 0511 00 315 0511 00 315 0511 00 RES XD FI SEMICOND DVC DI SW SI 30V 150MA 30V DO0 35 SEMICOND 0 01 54 51 30 150 30 0 35 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 SEMICOND DVC DT SW SI 150MA 30V DO 35 SEMICOND DVC D1 SW SI 30V 150MA 30V D0
29. RES FXD FILM 51 0HM 52 0 25W RES FXD FILM 4 99K OHM 14 125W TC T9 RES FXD FILM 442 0HM 12 0 1254 TC T2 RES FXD FILM 1M 52 0 25 RES VAR NONWW 10K 0 RES FXD FTLM 10K 0HM 52 0 25W RES NTWK FXD F1 7 68 0HM 202 RES FXD FILM 300 0HM 52 0 25W RES NTWK FXD FT 7 68 OHM RES NTWK FXD FT 7 68 OM RES NIWK FXD FI 7 68 OHM 0 1254 RES NTWK FXD FI 7 68 20 0 1254 RES FXD FILM 68 5 0 25 RES NTWK FXD FI 7 68 20 0 1254 RES NTWK FXD F1 7268 20 0 125 RES NTWK FXD F1 7 68 0HM 202 0 125W RES NTWK FXD FT 7 68 0HM 202 0 125W RES F1 7 68 OHM 202 0 125W RES NTWK FXD F1 7 68 OHM 20 0 125W RES NTWK FXD FT 7 68 0HM 202 0 125W DW 20 20 20 Mfr Code 04222 04222 04222 04222 04222 04222 12954 07263 07263 07263 07263 07263 50434 07263 07263 07263 07263 50434 07263 TK1345 TK1345 04713 04713 91637 91637 57668 57668 91637 91637 91637 91637 57668 91637 91637 19701 19701 91637 32997 19701 91637 91637 19701 32997 19701 91637 5 668 91637 91637 91637 91637 57668 91637 91637 91637 9163 91637 9163 91637 Mfr Part Number MD015E47374B MDO15E473ZAB MD015E47374B MD015E473748 MD015E47 374B MD015E47374B D4R7B35K1 1N4152 1N4152 1N4152 1N4152 1N4152 5082 2811 1N4152 1N4152 1N4152 1N4152 5082 2811 1N4152 108 0520 00 108 0520 00 2N3904
30. 1 254 1 268 Al3W512 3W568 Al4 Al4 14 115 14 120 14 125 Al4C130 14 132 14 133 14 135 14 150 4 160 14 175 14 178 14 180 14 185 14 190 14 210 14 235 14 236 14 330 14 333 14 375 14 382 14 410 14 462 14 516 14 525 14 527 9 24 Tektronix Part Number 156 2458 00 156 1172 01 160 3557 00 156 1191 01 156 1147 02 156 1408 00 156 1693 03 156 2458 00 156 1161 00 156 1191 01 156 2514 00 156 1967 00 152 0055 00 152 0055 00 152 0055 00 152 0611 00 152 0749 00 152 0022 00 152 0282 00 152 0824 00 152 0247 00 152 0289 00 152 0289 00 152 0667 00 175 6420 00 175 6420 00 175 6420 00 175 6420 00 174 0081 00 131 0566 00 670 7523 10 670 7523 11 283 0422 00 283 0422 00 283 0422 00 283 0422 00 281 0809 00 283 0422 00 283 0422 00 283 0422 00 283 0422 00 283 0422 00 283 0422 00 283 0422 00 283 0422 00 290 0891 00 283 0422 00 283 0422 00 281 0767 00 283 0422 00 283 0422 00 281 0759 00 281 0765 00 281 0811 00 281 0759 00 283 0422 00 281 0759 00 283 0422 00 Serial Number Effect BO10100 010883 B010884 Discont Part Name amp Description TC DIGITAL CMOS BUFFER DUAL INVERTER 426 IC DIGITAL LSTTL COUNTER DUAL 4 BIT BINARY MICROCKT DGTL STTL OCTAL 16 IN AOI GATE MICROCKT LINEAR BIFET DUAL AMPL SCRN IC MISC BIP
31. 2 RECTIFIER 3 1 AND FILTER E 2 C173 5 2 3304F a 3 001 Tu 10 1 5 B 2 Eco 1 gt 18 E 2 7 5100 P OFF ON E Z4 CcR241 E MAIN POWER 1 f SWITCH 4 I 1 x 2 U375 T 5 Cil I JF 5V 14 y CRIS VCRIS3 i Je eTriBz y 1 7905 Sv ALL PINS 22 1 10 B sour E T 1 J100 WIOO 5 CHASSIS 1 s gt TPIS 5 2 1e 1 GND SENSE P O INTERFACE 227770227 5 WHO D 1 9 C D 3 i gore RE zomr is PISI 2 MAIN REGULATOR 1 5V E a 2 5 Simi T RZT4 cie je Y 1 soour T3 c ew 1 ds salad ica 390 2 H SWITCI P O eo FRONT PANEL SHUT DOWN S J130 1 i 2 Q379 NOISY GND ALL PINS 5 lt STB TT 1 10 INTERFAC I f D t V 2 0 W120 9 lt 55 ar T d Edi SW 3 TERMINAL REGULATORS C 5 0V R27 4 BNA CR2B2 a R368 7 100 15v SENSE 8 12V 5 COMPONENT NUMBER EXAMPLE P O P O WHO Component Number fi er A23 A2 R1234 Assembly 24 yes Number Subassembly Number Number if used Chassis mounted components have no Assembly Number pre ix see end of Replaceable Electrical Parts List P O OVER VOLTAGE PROTECT
32. 29 gt V COMPONENT NUMBER EXAMPLE Component Number V NOTE Table 10 1 shows 23 2 R1234 Pinout amp Assembly s ME 3 n Number Subassembiy Number Static Sensitive Devices Number it used See Maintenance Section Chassis mountec components Assembly Number prefix see end of Replaceable Electricai Parts st P O CRT DRIVE BD 241 SERVICE 5378 52 REV MAY Bb P O WIZI P O 121 OR FROM INTERFACE J 740 NOTE I CHASSIS GROUND H7 THROUGH SCREW MOONT CREME J470 2475 13 IAGCH AIG car AIO AG IAI 2 H B 2 A2S TD amp H COMM PACK PORT ON s AT eeAR PANEL a AIS IRD L Al Bi m Bof csl besss 12 2 8 1 1 gu ZW NEN 2 N C 80 L573 FLEN 220 BQH BIS C568 CS6S AVI C BIT v DRIVE GREEN BI VIDEO Ba N C B9 Bio PACK PORT _COMM REAR PANEL CIRCUITS lt POWER SUPPLY BOARD frame Locat 07 1241 Power Supply Board Mai 10 4 igure F qoe meas PT eS esc RR del tts o tentem i as R370 R371 fr tate HA o 5 47 ato ee echa MA SPUR
33. At max SYNC rate recognize any input event meeting setup and hold times and minimum word width Up to 14 different events one per sequence level Timebase period selectable from 10 ns to 1 s in 1 2 5 increments Timebase period Bns with 1240D2 samples of word requires Nx T 6ns min word width or NxT 8ns with 1240D2 2 9 Specifications 1241 Addendum Table 2 2 cont 1240D1 ELECTRICAL SPECIFICATIONS Performance Characteristic Requirements Glitch capture glitch width glitch amplitude 350 mV above and below pro grammed threshold ASYNC events Global event for all channels min data word width guaranteed to be sampled clocked Timebase period 6 ns 1 0 X unclocked 16 ns min 1 0 X Sequential event Timebase 6 ns 1 0 X PROBE THRESHOLD Threshold range Threshold accuracy with probe 0 5 65 mV MN 2 10 Supplemental Information 6 ns at threshold single channel at max glitch data transition rate of 30 ns A glitch may be detected as both glitch and data if the transition occurs within 2 ns of the sample clock Timebase period 8 ns with 1240D2 Minimum width of valid event when global filter 1 at 10NS and no 1240D2 channels specified Up to 14 different events one per sequence level Timebase period 8ns with 1240D2 For both global and sequential events N samples of word requires N x T 6ns min word width or 8ns with 12
34. RCPT RECEPTACLE TPG TAPPING RES RESISTOR TRH TRUSS HEAD RGO RIGID V VOLTAGE RLF RELIEF VAR VARIABLE RTNR RETAINER W WITH SCH SOCKET HEAD WSHR WASHER SCOPE OSCILLOSCOPE XFMA TRANSFORMER SCR SCREW XSTR TRANSISTOR 11 1 Replaceable Mechanical Parts 1241 Addendum CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Mfr Code Manufacturer Address City State Zip Code 07 79 INC SEMICONDUCTOR GROUP 01295 TEXAS INSTRUMENTS INC 01536 TEXTRON INC CAMCAR DIV 2660 CORP 04713 MOTOROLA INC 04919 COMPONENT MFG SERVICE INC 5574 VIKING CONNECTORS INC 05383 PANDUIT CORP 05540 MITE CORP 7416 NELSON NAME PLATE CO 8530 RELIANCE MICA CORP 9922 BURNDY CORP 12327 FREEWAY CORP 12697 CLAROSTAT MFG CO INC 13103 THERMALLOY CO INC 16428 COOPER BELDEN ELECTRONIC WIRE AND CABLE 18680 HIGHLAND MFG CO THE 22526 DU PONT E I DE NEMOURS AND CO INC 22670 GM NAMEPLATE INC 24931 SPECIALTY CONNECTOR CO INC 27014 NATIONAL SEMICONDUCTOR CORP 27238 BRISTOL INDUSTRIES 2264 MOLEX INC 31781 EDAC INC 31918 SCHADOW INC 54422 NORTHWEST TECHNOLOGY INC 57034 ADVANCED CIRCUIT TECHNOLOGY INC 61058 MATSUSHITA ELECTRIC CORP OF AMERICA 2800 FULLING MILL BOX 655012 13500 N CENTRAL EXPY 1818 CHRISTINA ST 4300 COMMERCE CT 5005 MCDOWELL RD 1 COMPONENT PARK 21001 NORDHOFF ST 17301 RIDGELAND 446 BLAKE ST 3191 CASITAS 341 39TH ST RICHARDS AVE 9301 ALLEN DR LOWER WASHINGTON ST 202
35. RES NTWK FXD F1 7 68 OHM 202 0 125W RES NTWK FXD F1 7 68 20 0 1254 RES FXD FILM 100 0HM 52 0 25W RES NTWK FXD F1 7 68 OHM 202 0 125W RES FXD FILM 100 0HM 52 0 25W RES NTWK FXD F1 9 330 0HM 22 1 2W RES FXD FILM 5 1K 0HM 52 0 25W RES FXD FILM 5 1K OHM 5 0 25W RES FXD FILM 330 OHM 5 0 25W 5 5 2 TERMINAL PIN 0 36 0 025 PH BRZ GOLD PL TERMINAL PIN 0 36 0 025 PH BRZ GOLD PL IC DIGITAL ECL GATES QUAD 2 INPUT OR 10103 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 IC DIGITAL 4 BINARY 10016 IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 IC DIGITAL QUAD EXOR 10113 D1P16 3 IC DIGITAL COUNTER 4 BIT BINARY 10016 IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT IC DIGITAL ECL GATES QUAD 2 INPUT OR 10103 MICROCKT LINEAR DUAL BI FET OPNL AMPL LOW RES FXD CMPSN 51 0HM 52 0 125W MICROCKT LINEAR DUAL BI FET OPNL LOW RES FXD CMPSN 51 0HM 52 0 125W IC CONERTER BIPOLAR D A 8 BIT 5018 DIP22 4 IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 IC MEMORY ECL 256 X 4 13NS 01 24 4 5 L X 5 L X IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 IC MEMORY ECL SRAM 256 X 4 13NS 01 24 4 IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 IC MEMORY ECL SRAM 256 X 4 13NS 01 24 4 IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4
36. SECONDARY RECTIFIER FILTERS 3 TERMINAL REGULATORS 3 VOLT SUPPLY Figure 8 1 1241 power supply troubleshooting tree cont Troubleshooting and Repair 1241 Addendum 8 10 IS 3VOLT OUTPUT AT 5V CHECK Q461 OPEN Q387 0487 U385 L445 OR ASSOC CKT CHECK Q461 SHORTED Q387 Q487 U381 OR ASSOC CKT 15 9471 2 8V 451 CR341 CR342 AND C361 CHECK CR253 CR254 T261 AND C472 IS U472 OR U481 PIN3 AT 16V CHECK CR251 CR252 T261 AND C173 IS U181 PIN2 TAB AT 16V CHECK U181 AND U481 Figure 8 1 1241 power supply troubleshooting tree cont Troubleshooting and Repair 1241 Addendum CRT DRIVE BOARD TROUBLESHOOTING Troubleshooting trees and circuit waveforms are provided for 1241 CRT Drive Board troubleshoot ing The first tree points the technician to the correct troubleshooting trees that follow Each of these trees corresponding to the major CRT function blocks then guide the technician to the problem source The circuit waveforms referenced in the troubleshooting trees are used for signal comparison during troubleshooting DISPLAY PROBLEM NO CHECK POWER SUPPLY 2 TROUBLESHOOT HIGH VOLTAGE CIRCUIT CHECK CATHODE Z AXIS AMPLIFIER DISPLAY PRESENT YES HORIZ EDGES 58 TROUBLESHOOT FEEDBACK CONT
37. U245 The value O1nex is written to ACOOnex this allows the Red RAM A12U145 to be read with the 9 8 MHz clock inverted The contents of the diagnostic window is checked for FOnex Next 02 is written to 0 this allows the Green RAM A12U245 to be read with the 9 8 MHz clock inverted The contents of the diagnostic window is read and should contain FOnex The value O3nex is written to ACOOnex this allows the Green RAM to be read with the 9 8 MHz clock not inverted The contents of the diagnostic window is read and should be FOnex Finally 04 is written to ACOOnex this allows the Red RAM to be read with the 9 8 MHz clock not inverted The contents of the diagnostic window register is checked for 3510 Error index Explanation Before each read of the diagnostic window register a 60 Hz interrupt must occur In this case the 60 Hz interrupt did not occur and the diagnostic test was not run Probable Cause Action The 60 Hz interrupt is not working Run the I O Processor s INTERRUPT area diagnostic correctly test to determine why the interrupt is not working Since the I O INTERRUPT test has already been run before reaching this point the failure is probably an intermittent one Looping on the interrupt test may help in finding the error 3511 Error index Explanation The highlight space character could not be read back from the Red RAM with the nor mal 9 8 MHz H clock Probable Cause Action The 19 6 MHz
38. rolled out unless additional instrument cooling is provided Refer to Proper Cooling of the 1241 in section 5 of this addendum DO NOT place the 1241 onto its front face with the front panel removed Damage may result due to excessive force on boards and components DO NOT place the instrument onto its front face without covering the emblem abrasion may wear off the coloring To protect the front face install the front panel cover DO NOT exceed the following torque values when re assembling any 1241 plastic parts PLASTIC MAX TORQUE AREA in Ibs Mainframe 4 5 Card cage 4 5 Power supply 3 0 Control Processor Board 4 5 COMM packs 4 5 ROM or RAM packs 4 5 DO NOT disconnect probes from the side of the 1241 by pulling on the cables pull only on the plastic cable holders DO NOT press or pull on components when manipulating circuit boards GUARD against static discharge damage by following the precautions listed in the Maintenance section TOOLS REQUIRED magnetic screwdriver 1 4 inch drive POZIDRIV type bit 1 POZIDRIV type bit 2 Phillips type bit 0 Allen wrench 1 16 inch flat blade screwdriver 5 16 inch nut driver for CRT Drive groundstrap nut 6 2 REV MAR 1986 Disassembly installation Procedures 1241 Addendum PROCEDURE 7 1241 LED PHOTOTRANSISTOR BOARDS DISASSEMBLY 1 2 3 Refer to section 6 of the 1240 1241 Logic Analyzer Service Manual Perform Proc
39. selections are 1 when T1 active T2 when T2 active and 10NS N 2 16 N 1 16 N is value of FILTER field selections are 1 16 T is value of ON field filter timebase and selection T1 T2 10NS is same as sample clock Filtered event becomes valid on Nth contiguous valid acquisition event Combined 1240D1 and 1240D2 ASYNC ac quisition requires additional 2 ns word width global event unclocked Data valid gt 12 ns 20 ns with respect to data clock Data valid 12 ns 20 ns with respect to data clock Specifications 1241 Addendum Table 2 1 cont 1241 ELECTRICAL SPECIFICATIONS Performance Requirements Characteristic Supplemental information SEQUENTIAL EVENT Filter accept event Sequence level execution rate RESET action Storage qualification TO OCCUR nnnn TIMES Delay nnnn CLOCKS RESET TRIGGER COUNTER TIMER COUNT mode INCR CNTR TIME mode START TIMER TIME WHILE NxT One count per valid event 1 9 999 system clocks One count per valid event must satisfy filter Accuracy start to stop 20ns Event may consist only of groups assigned the same timebase N is the value of the FILTER field selections are 1 16 T is the period of the active time base for that level Time after sequential event occurs before next level is allowed Reset from a sequential event to the timer is not guaranteed if sequential event has a SYNC timebase Res
40. 0492 00 156 1733 00 156 1733 00 156 1733 00 670 7696 00 670 7696 01 281 0823 00 281 0823 00 281 0823 00 281 0775 00 281 0823 00 281 0823 00 281 0775 00 281 0823 00 290 0743 00 281 0775 00 281 0775 00 281 0775 00 290 0847 00 281 0823 00 281 0775 00 317 0103 00 156 0878 01 156 0479 02 156 08 9 01 160 1915 00 160 1915 01 156 1336 01 670 7697 01 Serial Number B010100 B020000 B020000 B010100 8020000 8020170 Effect Discont 8019999 8019999 8021276 Replaceable Electrical Parts 1241 Addendum Part Name amp Description RES NIWK FXD FI 100 205 0 5 MICROCKT LINEAR OPERATIONAL AMPLIFIER SCRN CIRCUIT BD ASSY ACQUISITION EXTENDER 067 1103 03 0PTIONAL ACCESSORY CAP FXD CER DI 0 1UF 202 50V DI 0 1UF 20 50V DI 0 1UF 20 50 CAP D1 0 1UF 20 50V DI 0 1UF 202 50V DI 0 1UF 202 50V CAP FXD CER DI 0 1UF 20 50 DI 0 1UF 202 50V DI 0 1UF 202 50V CAP DT 0 1UF 20 50V CAP FXD CER DI 0 1UF 202 50V 01 0 10 20 50 DI 0 1UF 20 50V DI 0 1UF 20 50V DI 0 1UF 202 50V DI 0 1UF 20 50V RES NIWK FXD F1 5 100 OH4 202 0 75W RES NTWK FXD FI 5 100 OHM 202 0 75W RES 100
41. 16 X 4 6NS DIP16 3 04713 10H145 Al4U340 156 1733 00 IC DIGITAL ECL OR NOR SCRN 04713 10H101 9 28 REV JAN 90 Replaceable Electrical Parts 1241 Addendum Tektronix Seria Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number A14U345 A14U350 A14U360 A14U395 Al4U415 A14U420 A140425 A140430 A14U433 A14U435 Al4U440 A14U445 140450 A14U460 A14U465 A14U470 A14U475 140480 A14U485 140490 A14U495 140515 140520 140525 140530 140533 140535 140540 140545 14 555 A14U560 A14U565 140570 A14U575 140580 140585 140590 A14U595 140615 140620 140625 140630 140633 140635 140640 Al4U645 A140650 14 655 140660 140665 140675 140680 140685 140690 140695 14 614 15 REV JAN 90 156 1794 00 156 1674 00 156 1639 01 156 0469 02 156 1641 01 156 1642 01 156 1639 01 156 1710 00 156 1639 01 156 1038 01 156 1639 01 156 1642 01 156 1641 01 156 1639 01 156 1641 01 156 1641 01 156 1733 00 156 1674 00 156 1639 01 156 2142 00 156 0469 02 156 1639 01 156 1795 00 156 1639 01 156 1682 00 156 16 4 00 156 16 6 00 156 1700 01 156 1849 00 156 1639 01 156 1710 00 156 1639 01 156 1794 00 156 1639 01 156 1794 00 156 1639 01 156 1639 01 156 1642 01 156 0205 02 156 0743 01 156 0630 01 156 1794 00 156 1794 00 156 1794 00
42. 5 08 01 680 OR MSPO AL4R495 307 0598 00 RES NIWK FXD F1 7 330 OHM 22 1 0W 91637 MSP08A01331G OR CSCO 148510 311 2082 00 RES VAR NONWW TRMR 200 OHM 10 0 5W 32997 3386F 14 201 AL4R515 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 5 668 100 52 0 25w Al4R520 307 0587 00 RES NTWK FXD F1 7 68 0HM 202 0 125W 91637 CSCOBA01 680 OR MSPO 9 26 REV JAN 90 Component No A14R521 AL4R524 A14R525 Al4R526 A14R530 A14R533 Al4R538 Al4R541 AL4R542 Al4R544 Al4R545 A14R550 A14R551 AMR552 Al4R554 Al4R555 AL4R565 Al4R570 Al4R585 148586 Al4R610 Al4R611 Al4R612 Al4R613 Al4R614 Al4R615 Al4R616 Al4R617 Al4R618 Al4R620 Al4R622 Al4R624 Al4R625 A14R626 Al4R628 Al4R635 14 640 Al4R652 Al4R653 14 655 Al4R656 Al4R65 AL4R658 Al4R6 0 4 6 2 AI4R676 AL4R679 14 680 Al4R681 Al4R684 Al4R685 Al4TP118 Al4TP160 AIATP180 Al4TP248 14 260 A14TP262 A14TP343 AIATP344 REV JAN 90 Tektronix Part Number 315 0681 00 315 0101 00 317 0561 00 315 0272 00 307 0587 00 307 0587 00 315 0680 00 317 0101 00 315 0680 00 315 0680 00 307 0587 00 317 0101 00 311 0605 00 317 0221 00 317 0101 00 307 0587 00 307 058 00 307 0587 00 307 0587 00 315 0511 00 311 2082 00 315 0102 00 315 0331 00 315 0470 00 315 0680 00 307 0587 00 307 0721 00 315 0151 00 307 0721 00 307 0594 00 315 0221 00 315 0221 00 307 0587 00 307 0
43. 7 1 7 1 7 2 7 2 7 2 7 3 7 4 7 4 7 5 7 5 1241 SERVICE ADDENDUM TABLE OF CONTENTS cont Page 1241 TROUBLESHOOTING WITHOUT ERROR INDEXES 8 5 Damage Resulting From Incorrect Board Installation 8 5 Power Supply Troubleshooting 8 6 1241 Thermal Fuse 8 6 1241 Power Supply Troubleshooting Trees 8 6 CRT Drive Board Troubleshooting 8 11 PTOCGOSSOP LEDS 8 25 Kernel Signature Analysis 8 25 I O Processor Kernel Troubleshooting 8 25 Control Processor Kernel Troubleshooting 8 25 TROUBLESHOOTING USING DIAGNOSTICS ERROR INFORMATION 8 30 Diagnostics Overview 8 30 Error Index Overview 8 31 I O PROCESSOR KERNEL LED ERROR INDEXES 8 33 Power Up Stage 0 8 38 HAM EA 8 41 ROM Pack Stage 2 8 43 COMM Stage 3 8 48 3XXX DISPLAY ERROR INDEXES 8 49 AREA 1 8 52 32XX VERTICAL SCROLLING AREA 2 8 56 33XX HORIZONTAL SCROLLING AREA 3 8 59 34XX REVERS
44. 8 23 8 12 13 200 4 color shutter drive A13TP148 vertical flyback 8 24 8 13 A13U138 11 VDRIVE GREEN H A13U138 12 VDRIVE H 8 24 8 14 A13U138 12 VDRIVE H A13TP148 vertical drive 8 24 8 15 1241 error index 8 31 8 16 I O Processor Kernel Stage 0 block diagram 8 34 8 17 Processor Board component location 8 35 1241 SERVICE ADDENDUM Figure 8 18 8 19 8 20 8 21 8 22 8 23 8 24 8 25 8 26 8 27 Table 2 1 2 2 2 3 2 4 2 5 2 6 4 1 5 1 5 2 5 3 5 4 8 1 8 2 8 3 8 4 8 5 8 7 8 8 8 9 LIST OF ILLUSTRATIONS cont I O Processor Kernel Stage 1 block diagram I O Processor Kernel Stage 2 block diagram I O Processor Kernel Stage 3 block diagram Display RAM block diagram Display Board component location Display VERTICAL SCROLLING block diagram Display HORIZONTAL SCROLLING block diagram Display REVERSE VIDEO block diagram Display HIGHLIGHTING block diagram Display WAVEFORM block diagram LIST OF TABLES 1241 Electrical Specifications
45. DL 35 13 85259 16 US40A Uses TPO626 5V 0 1 C526 ky 5 6 R4SOF 9520 349 3V IOHIOT USIOAC 4 EE Q is cow fo ui IIT P o Peso B39 cT INCL 10H04 R455G U608B 1OHI3I 94358 74574 4518 IO HI3I e 10 mS CL A46 CT RESET H 06158 IOHIO7 4 R4GSE I R465F rer oe ares COMPONENT NUMBER EXAMPLE 7 USSOC 2204 8 oe Component Number iOHIOS ARA A23 A2 R1234 i Schematic Assembly _ Circuit Number Subassembly Number Number if used Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List lOHIOS 14 Static Sensitive Devices See Maintenance Section 22222222227 1555050 PESO CT OUT L A4 NOTE Table 10 1 shows Pinout amp Gnd i241 SERVICE s378 51 COUNTER TIMER gt Table 10 9 ASYNCHRONOUS TIMEBASE DISPLAY BOARD ASSEMBLY A12 CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION C406 AS A3 R486 C4 E3 C445 1 C3 R490 C4 F3 C446 1 C3 R492 E3 F3 C480 F3 E3 R495 A4 F2 C596 C1 F3 R575 F2 E3 C597 B4 F3 U450B B2 D2 CR395 A3 F2 U455 B2 D2 CR465 B2 D3 U465 C2 D2 L446 A1
46. IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 IC MEMORY ECL SRAM 256 X 4 13NS 01 24 4 IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 MICROCKT CMOS ANALOG MUX DEMUX DGTL CMOS ANALOG MUX DEMUX MICROCKT DGTL CMOS ANALOG MUX DEMUX IC DIGITAL 05 QUAD 2 INPUT OR 74C32 IC DIGITAL LSTTL QOUNTER SYNCH 4 BIT BINARY TC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 IC DIGITAL GATE QUAD OR NOR SCRN IC MEMORY ECL SRAM 1K X 1 100NS 01 16 3 IC MEMORY ECL SRAM IK X 1 100NS 01 16 3 IC MEMORY ECL SRAM 1K X 1 100NS DIP16 3 IC MEMORY ECL SRM 1K X 1 100NS 01 16 3 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT DIGITAL ECL GATE DUAL 4 5 INPUT OR NOR Mfr Code 01121 19701 19701 19701 5 668 91637 5 668 91637 91637 91637 91637 5 668 91637 5 668 91637 5 668 5 668 5 668 22526 22526 04713 04713 07263 07263 07263 07263 04713 0 263 07263 04 13 04713 27014 01121 2 014 01121 18324 27014 2 014 21014 27014 27014 27014 27014 27014 27014 27014 04713 04713 04713 27014 01295 04713 04713 Mfr Part Number 330 5 0 125w 510 5 0 25w 51 52 0 25w 51 5 0 25w 68 5 0 25w CSCOBA01 680 OR MSPO 68 5 0 25w CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO 100 5 0 25w CSCOBAO1 680 OR MSPO 100 52 0 25w CSC10B 01 331G MSP10 5100 5 0 25w 5100 5 0
47. In some instances extender boards will degrade system performance For complete details refer to the timing limitations in the Specifications section of this manual and the instruction sheet that accompanies each extender board FUNCTIONAL CHECK PROCEDURES The Functional Check Procedures are a limited number of quick tests that an operator can perform as an incoming inspection The Functional Check Procedures for the 1241 are identical to those of the 1240 Refer to Section 5 the 1240 1241 Service Manual PERFORMANCE VERIFICATION PROCEDURES INTRODUCTION Many of the 1241 performance verification procedures are identical to those used for 1240 verification This section contains only those procedures that are unique to the 1241 The 1241 pro cedures in this section are replacements for similar procedures in the 1240 1241 Logic Analyzer Service Manual Refer to the 1240 1241 Logic Analyzer Service Manual tor procedures not given here The procedures given in this section contain checks on specifications listed in the performance requirements column of the Specifications section Items listed in the performance requirements columns are specifications that the instrument must meet If verification of the listed electrical specifications is required for incoming inspection or other purposes perform the performance verificationprocedures outlined in this portion of the Verification and Adjustments section The Performance Verification Proc
48. LINE 01295 SN74LS244N3 409211 156 1111 02 IC DIGITAL LSTTL BUS TRANSCEIVER OCTAL 01295 SN74LS245N3 A09U214 156 0541 02 IC DIGITAL LSTTL DEMJX DECODER DUAL 2 TO 4 01295 SN74LS139N3 4090217 156 0956 02 IC DIGITAL LSTTL BUFFER NONINV OCTAL LINE 01295 SN74LS244N3 090220 156 0865 02 IC DIGITAL LSTTL FLIP FLOP OCTAL D TYPE 01295 7415273 A090224 160 3083 00 MICROCKT NMOS 16384 X 8 EPROM W 3 80009 160 3083 00 10911229 156 1632 00 1 1 0 012878 IC MEMORY CMOS SRAM 2K X 8 250NS DIP24 6 61772 6116 4090229 156 1632 00 8012879 IC MEMORY CM0S SRAM 2K X 8 250NS DIP24 6 61772 6116 90233 156 0541 02 IC DIGITAL LSTTL DEMUX DECODER DUAL 2 0 4 01295 58741513983 A09U236 156 0382 02 IC DIGITAL LSTTL GATES QUAD 2 INPUT NAND 01295 741500 090239 156 1065 01 IC DIGITAL LSTTL LATCH OCTAL D TYPE 01295 17415373 A09U246 156 1428 02 IC PROCESSOR NMOS PERIPHERAL CLOCK 34649 8284 1091254 156 0323 02 IC DIGITAL STTL GATEsHEX 74504 01 14 3 01295 7450 A255 156 0693 02 IC DIGITAL DEMJX DECODER DUAL 2 T0 4 01295 745139 90257 156 0739 02 IC DIGITAL STTL GATES QUAD 2 INPUT OR 74S32 01295 SN74S32N3 A09U258 156 0478 02 IC DIGITAL LSTTL MUX DUAL 4 INPUT AND 01295 59874152183 AQ9U261 156 0422 02 IC DIGITAL LSTTL COUNTER SYNCH 4 BIT 01295 SN74LS191N3 091262 156 0469 02 IC DIGITAL LSTTL DEMJX DECODER 3 TO 8 01295 54741513883 1264 156 0422 02 IC DIGITAL LSTTL COUNTER SYNCH 4 BIT 01295 SN74LS191N3 A09J2
49. MEMORY ECL SPAM 16 X 4 685 DIP16 3 27014 10402 A120530 156 1641 01 IC DIGITAL ECL GATES QUAD 2 INPUT NOR 04713 101102 29535 156 1038 01 IC DIGITAL ECL 4 BINARY 10016 07263 10016 AL2U540 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 21545 156 0205 03 IC DIGITAL ECL GATES QUAD 2 INPUT OR 10102 04713 10102 Al2U550 156 1642 01 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT 04713 10H105 Al2U555 156 1710 00 IC DIGITAL ECL GATE DUAL 2 WIDE 2 3 INPUT 04713 10H117 Al2U560 156 1172 01 IC DIGITAL LSTTL COUNTER DUAL 4 BIT BINARY 01295 SN74LS393N3 Al2U565 156 1038 01 IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 07263 10016 Al2U570 156 1667 00 IC DIGITAL ECL MJX 8 TO 1 SCRN 10H164 04713 10H164 Al 20580 156 0910 02 IC DIGITAL LSTTL COUNTER DUAL 4 BIT DECADE 01295 74LS390 Al2U585 156 0910 02 IC DIGITAL LSTTL COUNTER DUAL 4 BIT DECADE 01295 74LS390 Al2U590 156 0910 02 IC DIGITAL LSTTL COUNTER DUAL 4 BIT DECADE 01295 7415300 120595 156 0390 02 IC DIGITAL LSTTL DEMUX DECODER DUAL 2 0 4 01295 7415155 12 598 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74C374 AL2U600 156 1647 00 IC LINEAR BI POLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 Al 20605 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 AL2U608 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 Al2U610 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H
50. Refer to Tabie 5 3 for tolerances 6 Reset the variable transformer output for the appropriate high line voltage setting 132 volts when Line Select is set to 115 V 250 volts when Line Select is set to 230 V Re check the sup plies for the high line setting Table 5 3 POWER SUPPLY READINGS SUPPLY ripple 16V 15 0 V to 17 75 V 1 0 V p p max 12V 11 40 V to 12 60 V 1 V p p max 5 4 85 5 15 V 100 mV V 1 90 V to 2 10 V 100 mV max ref to 5 V 5 475 to 5 25 100 mV max 12 11 40 V to 12 60 V 1 V p p max Procedure 1B COMM Pack Power Supply Check 1 Remove the CRT Drive Board bracket Refer to procedure 8 CRT removal of the Disassem bly and Installation Procedures section of this addendum for specific instructions Check the CRT supply voltage on the COMM Pack connector A13J470 B17 It should be in the range of 11 64 V to 4 12 36 V PROCEDURE 2 DISPLAY HIGH VOLTAGE PERFORMANCE CHECK Equipment Required e P6015 High Voltage Probe test oscilloscope Check Procedure 1 Perform Procedure 1 cabinet removal 2 rear panel removal of the Disassembly and Installation Procedures section of this manual Connect the High Voltage Probe to the oscilloscope and set the range scale to 2 volts div Access the CRT module by removing the CRT Drive Board bracket Refer to the Disassembly and Installation Procedures section for sp
51. TRANSISTOR MICA 91500 23 337 3204 00 1 SHLD HEAT SINK 80009 24 131 2527 00 1 TERM SET PIN HEADER 1 X 7 0 156 CTR 21264 25 131 0608 00 82 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD P 22526 26 7131 1262 00 1 ELEC EDGECARD 20 40 CONT O 1 SP 05574 ATTACHING PARTS 27 211 0246 00 2 SCR ASSEM WSHR 4 40 X 0 625 PNH STL POZ 01536 END ATTACHING PARTS 28 151 1186 00 1 TRANSISTOR PWR MOS N CH 400V 8 0A 0 55 OHM 04713 ATTACHING PARTS 29 211 0097 00 1 SCREN MACHINE 4 40 X 0 312 PNH STL 93907 30 210 1178 00 1 WASHER SHLDR 13103 31 210 0586 00 1 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 END ATTACHING PARTS 32 342 0311 00 1 INSULATOR PLATE TRANSTSTOR MICA 01295 33 156 1967 00 1 IC LINEAR BIPOLAR VOLTAGE REGULATOR POS 27014 ATTACHING PARTS 34 211 0097 00 1 SCREW MACHINE 4 40 X 0 312 PNH STL 93907 35 210 1178 00 1 WASHER SHLDR 13103 36 210 0586 00 1 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 END ATTACHING PARTS 3 342 0202 00 1 INSULATOR PLATE TRANSISTOR 91500 38 214 1914 00 1 HEAT SINK DIODE 2 0 15 DIA HOLES AL 98978 39 214 3798 00 1 HEAT SINK XSTR ALUMINUM 80009 ATTACHING PARTS 40 211 0097 00 2 SCREW MACHINE 4 40 X 0 312 PNH STL 93907 41 210 0586 00 2 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 END ATTACHING PARTS 42 131 2485 00 1 TERM SET PIN 2 PIN INSULATED 27264 43 670 7534 15 1 CIRCUIT BD ASSY PWR SPLY 80009 44 214 3379
52. and modification number if applicable if a part you have ordered has been replaced with a new or improved part your local Tektronix inc Field Office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual ITEM NAME In the Parts List an Item Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further item Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible FIGURE AND INDEX NUMBERS Items in this section are referenced by figure and index numbers to the illustrations INDENTATION SYSTEM This mechanical parts list is indented to indicate item relationships Following is an example of the indentation system used in the description column 12345 Name amp Description Assembly and or Component Attaching parts for Assembly and or Component END ATTACHING PARTS Detail Part of Assembly and or Component Attaching parts for Detail Part END ATTACHING PARTS Parts of Detail Part Attaching parts for Parts of Detail Part END ATTACHING PARTS Attaching Parts always appear in the same indentation as the item it mounts while the detail parts are indented to the right Indented items are part of and included with the next higher indentation Attaching parts must be purchased separately unless
53. and the message DIAGNOSTICS IN PROGRESS is printed on the screen As each test runs the kernel is expanded and the LEDs are turned off in succession The code for the RAM test is stored on the Display Board in ROM A12U175 If the RAM test de tects a failure it loops on the failed address 11F1 or 11FF If no error is detected the microprocessor is vectored back to A10U160 the ROM byte test is entered 1011 If the complementary byte test detects a failure it exits to an error routine 1F 11 If the ROM complementary byte test passes the ROM checksum test is entered 1010 If the checksum test detects a failure the LEDs display a failure 1F1F If no failure is detected the complementary byte test for ROM A10U165 is entered 1001 If the complementary byte test detects a failure it exits to a failure routine 1FF1 If the complementary byte check for A10U165 passes the ROM checksum test is entered 1000 If the ROM checksum test detects a failure it exits to an error routine 1FFF After completing the tests on A10U165 the same tests are performed on A12U175 First a byte complement test is run on A12U175 If a failure is detected the LEDs display a failure F11F If no failure is detected a checksum test is entered F11F If the checksum passes an attempt is made to access the COMM Pack If access is not possible an error routine is entered 0101 Next a checksum test is run on the COMM
54. om o aee aa 5627 x gt a es B a NN mu EE NT DM re m AMEN S 4 Ex ER ae RIT ziga ecd aM ns a a lg scan la 7 eeen 4 ___ __ I sscn aren tri coen amp epp gu je sven osen I ens h ecen SS dam eee SN c ade eee e wee J efter eat E i s Xu 0 es ee Ge J esi pull WU T Ka TU e set dus 1 E S H BH B DE UN am GOCE SEE SGvu oven sown iseen seva ween T gt 2vg Airvu f v mi prm RE mE ee Risto AT vl een e pq 7 casn esen la d WS escn ren 2 sesn 2 gesn ELEN 0199 wy LL L2 Le OO 1 201 1N3NOdWOO 3020 pius 598 8 35 Troubleshooting and Repair 1241 Addendum 8 36 KERNEL AREA CIRCUIT OVERVIEW The 1 Processor kernel circuitry is indicated by the shaded path on the block diagram The shading indicates circuitry exercised for the first time during diagnostic testing This Circuitry is comprised of a 280 micropro
55. quantities consists of Acquisition Threshold Fixture Terminal Conn Holder Mini PV Female Conn resistor 10 5 K ohm 196 26 gauge wire Equivalent Tektronix Instrument Or Part Tektronix P N 067 1103 03 Tektronix P N 067 1037 00 Tektronix P N 012 0118 00 Tektronix P N 012 0208 00 Tektronix P N 012 0076 00 Tektronix P N 012 0482 00 Tektronix P N 011 0049 01 Tektronix P N 015 0221 00 Tektronix P N 013 0084 00 Tektronix P N 103 0030 00 Tektronix P N 103 0028 00 Tektronix P N 003 0301 00 Tektronix P N 015 0325 00 Tektronix P N 352 0484 00 Tektronix P N 131 0707 00 Tektronix P N 321 0291 00 REV DEC 1989 Equipment Threshold Accuracy Fixture C Q Connection Fixture Data Communications Tester For testing RS232 COMM packs Self Test Adapter For testing RS 232 COMM packs Graphics Terminal For testing GPIB COMM packs Spare GPIB COMM Pack For testing GPIB COMM packs Verification and Adjustment 5 1241 Addendum Table 5 1 cont REQUIRED TEST EQUIPMENT Consists of BNC Connector one Terminal Lugs two BNC Nut one 1 uf ceramic cap 12 square pin set 2 rows 6 pins per row Consists of BNC Connector one Terminal Lugs one BNC Nut one 5 square pin set one Equivalent Tektronix Instrument Or Part Tektronix P N 131 0602 00 Tektronix P N 210 0255 00 Tektronix P N 210 0413 00 Tektronix P N 283 0177 00 Tektronix P N 131 2230 00
56. read This last sequence is repeated three times to give a total of four reads The values from the four reads are checked against the expected pattern If an error is detected the test aborts and the error is reported If no errors are detected the second pass of the test begins the second pass the 9 8 MHz clock is inverted by writing 03 to location ACOOnex The diagnostic character is scrolled twice then read This sequence is repeated three times to give a to tal of four reads The four values read are checked against the expected pattern If an error is de tected it is reported and the test is aborted 3210 Error Index Troubleshooting and Repair 1241 Addendum Explanation Before each read of the diagnostic window register a 60 Hz interrupt must occur In this case the 60 Hz interrupt did not occur and the diagnostic test was not run Probable Cause The 60 Hz interrupt is not working correctly The 9 8 MHz clock circuitry is not working The RG LATCH signal is invalid 3211 3214 Error Indexes Action Press the processor RESET switch to cause the 1 0 interrupt diagnostic to run again This will establish that the default 60 Hz interrupt is working Since the Processor s INTERRUPT test has already been run the failure is probably caused by writing different values to A12U420 If the I O interrupt test passes loop on the VSCROLL test and check A12U420 U310 and U105 Loop on the VSCROLL test a
57. 0 125W 01121 1M 5 0 125w A01R130 317 0105 00 RES FXD CMPSN 1M 5 0 125 01121 54 0 125w 317 0105 00 RES FXD CHPSN 1M OHM 52 0 125W 01121 5 0 125w 170 317 0105 00 RES FXD CMPSN 1M 0HM 52 0 125W 01121 54 0 125w 1 190 317 0105 00 RES FXD CMPSN 1M 5 0 125 01121 1M 5 0 125w A2 CIROUIT BD ASSY PT 2 NOT AVAIABLE ORDER 672 1130 00 9 4 REV JAN 90 4020110 4020170 A02R110 A02R170 A 40305110 10305130 0305150 A03DS170 A03DS190 AM A04DS110 A04DS170 A05C109 AD5C114 A05C118 5 119 5 121 A05C122 A05C127 A05C128 A05C133 05C203 A05C213 A05C248 A05C344 4050539 505204 505303 A05DS401 A05DS404 A0505503 AG5LR129 AOSLR134 ADSR105 A05R106 AG5R107 AO5R115 AQ5R116 5 117 120 A05R200 A05R215 ADSR302 ADSR331 A05R348 A05R527 4055108 4053118 055124 4055214 1055219 A05S229 REV JAN 90 Component No Tektronix Part Number 151 0252 01 151 0252 01 281 0813 00 281 0813 00 290 0943 00 281 0813 00 290 0943 00 281 0813 00 281 0813 00 281 0813 00 281 0813 00 281 0813 00 150 1043 00 150 1043 00 150 1043 00 150 1043 00 150 1043 00 108 0520 00 108 0520 00 301 0561 00 301 0561 00 301 0561 00 301 0561 00 301 0561 00 301 0561 00 301 0561 00 307 0696 00 303 0150 00 307 0790 00 307 0650 00 307 0540 00 307 0540 00 263 0019 09 263 0019 09 263 0
58. 0 75MM SQ 240V 98 0 L OPTION A2 UNITED KINGDOM CABLE ASSY PWR 3 18 AWG 240V 98 0 L OPTION A3 AUSTRALIAN CABLE ASSY PWR 3 18 AWG 240V 98 0 L OPTION A4 NORTH AMERICAN CABLE ASSY 3 1 00MM 50 250 10 OPTION A5 SWISS LEAD SET ELEC DIAGNOSTIC MANUAL TECH 1240 SEMINAR WORKBOOK MANUAL TECH OPERATORS 1240 1241 MANUAL TECH OPERATORS REFERENCE GUIDE OPTIONAL ACCESSORIES PROBE VOLTAGE P6101 1X 2 METER W ACCESS PROBE VOLTAGE P6105 2 METER 10X W ACCESS CABLE INTCON 2 0M L CABLE INTCON 4 0M L CABLE INTCON 2 0 METERS CABLE GPIB LOW 2 METER CABLE INTCON 2 METER BINDER 1240 OPERATORS ACCESSORIES PACKAGE MANUAL TECH INSTR 1240 FIXTURE CAL 1200C01 RS232 COMM PACK 1200002 GPIB COMM PACK 1200 11 PARALLEL PRINTER COMM PACK 1240D1 9 CHANNEL DATA ACQUISTION MODULE 124002 18 CHANNEL DATA ACQUISTION MODULE 12RD01 DIAGONISTIC ROM PACK 2RS01 8K RAM 12RS02 64K RAM PACK 126511 32K EPROM PACK 12RS12 32K EPROM PACK P6460 9 CHANNEL DATA ACQUISITION PROBE 16428 3109 3109 3109 3109 2156 P6460 9 CHANNEL DATA ACQUISITION PROBE TTL ONLY 200 2780 00 016 0 07 00 CH8352 FH 8352 VIIGSOPO HOSVVF3G0 ORDER BY DESCRIPTION SAA 3 OD3CCFC3X0 75 ORDER BY DESCRIPTION 12 HOSVVF3G 00 5 0 61500 062 6926 00 070 4340 01 070 4641 01 010 6101 11 010 6105 11 2024 2 156327 ORDER BY DESCRIPTION 553577 3 012 0997 00 062 6927 00 062 7470 00 067
59. 00 1 HEAT SINK XSTR 7 770 220 4 T0 218 AL 80009 ATTACHING PARTS 45 211 0101 00 2 SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL 93907 END ATTACHING PARTS 46 156 0846 00 1 IC LINEAR BIPOLAR VOLTAGE REGULATOR NEG 5V 01295 ATTACHING PARTS 4 210 0406 00 1 NUT PLAIN HEX 4 40 X 0 188 BRS CD PL 73743 48 210 1178 00 1 WASHER SHLDR 13103 END ATTACHING PARTS 49 152 0794 00 1 SEMICOND DVC DI RECT SI 10A 30V 70 220 81483 11 8 12CTQ030 REV JAN 1990 Fig amp Replaceable Mechanical Parts 1241 Addendum Index Tektronix Serial Number Mfr No Part Number Effect Discont Qty 12345 Part Name amp Description Code Mfr Part Number ATTACHING PARTS 3 50 210 0406 00 1 NUT PLAIN HEX 4 40 X 0 188 BRS CD PL 73743 12161 50 51 210 1178 00 1 WASHER SHLDR 13103 7721 7PPS END ATTACHING PARTS 52 151 0621 00 2 TRANSISTOR NPN SI T 220 04713 D44H3 ATTACHING PARTS 53 210 0406 00 2 NUT PLAIN HEX 4 40 X 0 188 BRS CD PL 73743 12161 50 54 210 1178 00 2 WASHER SHLDR 13103 7721 7PPS END ATTACHING PARTS 55 152 0793 00 2 SEMICOND DVC DI DUAL RECT SI 40V 25A 81483 95 4564 ATTACHING PARTS 56 210 0406 00 2 NUT PLAIN HEX 4 40 X 0 188 BRS CD PL 73743 12161 50 57 210 1122 00 2 WASHER LOCK 0 12 ID DISHED 0 025 THK STL 86928 210 1122 00 ATTACHING PARTS 58 342 0613 00 1 INSULATOR FILM TRANSISTORS MICA 80009 342 0613 00 59 200 2269 00 1 COVER XSTR TK2165 ORDER BY DESCRIPTION ATTACHING PAR
60. 0336 00 RES FXD WW 7 OHM 52 5W 91637 W5 2 7000 T R A07R321 315 0152 00 RES FXD FILM 1 5K OHM 52 0 25W 57668 1500 5 0 25w 78331 308 0079 00 RES FXD WW 117 OHM 52 5W 91637 CW5 117R0J T R A07 R365 315 0750 00 RES FXD F1LM 75 0HM 52 0 25W 5 668 75 5 0 25w A07 R366 315 0203 00 RES FXD FILM 20K 0HM 52 0 25W 57668 20K 52 0 25w AYR367 315 0102 00 RES FXD FILM 1K 5 0 25 57668 1000 5 0 25w A07 R368 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 57668 1000 5 0 25w 69 321 0222 00 RES FXD FILM 2 00K OHM 1 0 125W TC T0 91637 CMF55116G20000F 7370 321 0222 00 5 2 00 0HM 12 0 1254 TC TO 91637 CMF55116G20000F AYR371 317 0564 00 RES FXD CMPSN 560K OHM 5 0 125W 01121 560K 5 0 125w 7372 321 0661 00 RES FXD FILM 600 0HM 12 0 125W TC T0 91637 CMF551 1 6G600ROF 07 R373 315 0101 00 RES FXD FILM 100 0HM 52 0 2 57668 100 5 0 25w 078374 301 0751 00 FILM 750 0HM 52 0 5W 19701 750 5 0 5w 75 321 0344 00 RES FXD FILM 37 4K 0HM 12 0 1254 TC TO 91637 CMF55116G3 401F AY R376 315 0102 00 RES FXD FILM 1K OHM 5 0 25W 57668 1000 5 0 25w 807 R377 315 0751 00 750 0HM 52 0 25W 57668 750 5 0 25w 407R378 315 0391 00 RES FXD FILM 390 0HM 52 0 25W 5 668 390 5 0 25w AY R381 315 0104 00 RES FILM 100K OHM 5 0 25W 5 668 100 5 0 25w A07R383 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 57668 1000 52 0 25w A07 R38A 315 0102 00 RES FXD FILM 1K OHM 5 0 25W 57668 1000 5 0 25
61. 04713 01295 01295 01295 04713 04713 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 Mfr Part Number 14 3 4 SN74LSO4N3 TLO72C LF353 10H131 SN 4LS163AN P3 2112 1 2112 1 10188 2112 1 10188 2112 1 109105 10H117 10H101 10H174 74 374 811595 7415259 7415259 155 0270 00 155 0270 00 155 0270 00 10H101 10H117 10H131 10H131 10H117 10H131 10186 10186 10186 SN74LS138N3 SN74LS138N3 SN74LS245N3 10H109 10H116 670 7703 07 MD015E47 3748 MDO15E473ZAB 015 4737 MD015E473ZAB MD015 4732AB MD015bE4737AB MD015E47 3 MD015E473ZAB MD015E47374B MD015E47 374B MD015E47 324B SA201C103KAA 9 33 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discon Part Name amp Description Code Mfr Part Number Al6C152 281 0773 00 01 0 0 10 100 04222 SA201C103KAA 16 162 290 0177 00 CAP ELCTLT 1UF 202 50V 3143 T322B105MO50AS Al6C163 290 0177 00 CAP FXD ELCTLT 1UF 202 50V 31433 T322B105MO50AS 6 164 281 0775 00 01 0 10 20 50 04222 SAIOBE104MAA Al6C165 281 0792 00 DI 82PF 10 100V 04222 102 2 Al6C203 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E473ZAB 16 207 283 0422 00 DI 0 047UF 80 20 50V 04222 15 4732 Al6C2
62. 047UF 20 50V 04222 SA105E473MAA 12 220 281 0813 00 01 0 0470 20 50 04222 SA105E473MAA 12 230 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 5 105 473 Al2C235 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SA105E47 3MAA 12 240 281 0813 00 01 0 0470 20 50 04222 SA105E473MAA Al2C245 281 0813 00 DI 0 047UF 202 50V 04222 SA105E473MAA Al2C255 281 0813 00 DI 0 047UF 202 50V 04222 SA105E473MAA 12 265 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SA105E473MAA Al2C270 281 0813 00 CAP FXD CER DI 0 047UF 20 50V 04222 SA105E47 3MAA 12 275 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SA105E473MAA 12 280 281 0813 00 CAP FXD CER DI 0 047UF 202 5OV 04222 SA105E473MAA 12 290 281 0813 00 01 0 047 20 50 04222 12 298 281 0813 00 DI 0 047UF 202 50V 04222 SA105E473MAA 12 300 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SAI05E47 3MAA A12C307 281 0813 00 CAP FXD CER DI 0 047UF 20 50V 04222 SALO5E473MAA A12C308 281 0813 00 DI 0 047UF 20 50V 04222 SA105F473MAA A12C309 281 0813 00 CAP FXD CER 01 0 047 20 50 04222 SA105E473MAA 12 312 281 0813 00 CAP FXD CER DI 0 047UF 20 50V 04222 SA105E47 3MAA 12 315 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SA105E473MAA 12 3
63. 0HM 202 0 125W 91637 CSCO8A01 680 OR MSPO 148325 307 0587 00 RES NTWK FXD FT 7 68 205 0 125 91637 CSCOBA01 680 OR MSPO AAR333 315 0271 00 RES FXD FILM 270 OHM 52 0 25W 5 668 270 5 0 25w 4334 315 0331 00 RES FXD FILM 330 OHM 5 0 25W 57668 330 5 0 25w ALAR335 307 0587 00 RES NTWK FXD F1 7 68 0HM 202 0 125W 91637 CSCOBAO1 680 OR MSPO A14R345 315 0101 00 RES FXD FILM 100 OHM 5 0 25W 57668 100 5 0 25w A14R348 307 0587 00 RES 768 0HM 202 0 1254 91637 5 08 01 680 OR MSPO ALAR358 315 0101 00 100 52 0 25 57668 100 5 0 25w A14R365 315 0101 00 RES FXD FILM 100 OHM 5 0 25W 57668 100 5 0 25w ALAR366 311 0605 00 RES VAR NONWW 200 OHM 0 5W 32997 3329H CA8 201 A14R370 317 0101 00 RES FXD CMPSN 100 0HM 52 0 125W 01121 100 5 0 125w AL4R371 315 0221 00 RES FXD FILM 220 OHM 52 0 254 57668 220 5 0 25w Al4R373 315 0101 00 RES FXD FILM 100 OHM 5 0 25W 57668 100 5 0 25w AL4R374 311 0605 00 RES VAR NONWW 200 OHM 0 5W 32997 3329H G48 201 A14R375 315 0222 00 RES FXD FILM 2 2K OHM 5 0 25W 57668 2200 5 0 25w A14R378 315 0621 00 RES FXD FILM 620 5 0 25 57668 620 5 0 25w A14R385 315 0510 00 RES FXD FILM 51 OHM 5 0 25W 19701 51 52 0 25w A14R383 315 0131 00 RES FXD FILM 130 OHM 5 0 25W 19701 130 5 0 25w 148395 307 0598 00 RES NTWK FXD FT 7 330 OHM 2 1 0W 91637 MSPO8A01331G OR CSCO 4148410 315 0111 00 RES FILM 110 OH
64. 12 620 283 0422 00 CAP FXD CER DI 0 047UF 480 202 50V 04222 MD015F4737AB Al2C621 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E4737AB Al2C625 283 0422 00 DI 0 047UF 480 202 50V 04222 15 4737 12 630 283 0422 00 D1 0 047UF 80 202 50V 04222 MD015E4737AB AL2CR305 152 0322 00 SEMICOND DVC DI SCHOTTKY SI 15V 1 2PF DO 35 50434 5082 2811 Al2CR395 152 0141 02 SEMICOND DNC DI SW ST 30V 150MA 30V 00 35 07263 14152 Al2CR465 152 0141 02 SEMICOND OVC DI SW SI 30V 150MA 30V D0 35 07263 1M152 AL2CR476 152 0322 00 SEMICOND DVC DI SCHOTTKY SI 15V 1 2PF DO 35 50434 5082 2811 22429 131 0608 00 TERMINAL PIN 0 365 X 0 025 BRZ GOLD PL 22526 48283 036 122508 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 121446 108 0182 00 COIL RF FIXED 293NH TK1345 108 0182 00 12 429 131 0993 00 BUS CONDUCTOR SHUNT ASSEMBLY BLACK 22526 65474 006 A12R220 315 0102 00 RES FXD FILM 1K OHM 5 0 25W 57668 1000 5 0 25w 12 2 315 0102 00 RES FXD FILM 1K 52 0 25 57668 1000 5 0 25w AL2R305 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 57668 1000 5 0 25w Al2R396 315 0391 00 RES FXD F1LM 390 0HM 52 0 25W 5 668 390 5 0 25w AL2R397 315 0151 00 RES FXD FILM 150 OHM 5 0 25W 57668 150 5 0 25w AL2R398 315 0272 00 RES FXD FILM 2 7K 0HM 52 0 25MW 57668 2 00 5 0 125w 128420 307 0587 00 RES 1 7268 OHM 20 0 125W 91637 CSCO8
65. 16 145 Al6CR148 16 149 AL6CR166 AL6GCR244 ALGCR245 A16CR248 Al6CR249 AL6CR259 AL6CR56 161 160 161 161 160352 160353 Al6R102 Al6R103 16 104 Al6R112 Al6R142 AJ6R144 Al6R145 Al6R146 Al6R147 Al6R148 Al6R149 AL6R150 Al6R151 16 152 6 153 Al6R154 16 156 16 157 16 158 Al6R161 16 16 Al6R201 Al6R203 Al6R204 Al6R209 Al6R212 Al6R216 168220 168221 168225 166229 Al6R234 Al6R237 Al6R242 Al6R243 REV JAN 90 Tektronix 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0322 00 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0322 00 152 0141 02 108 0520 00 108 0520 00 151 0190 00 151 0188 00 307 0587 00 307 0587 00 315 0512 00 315 0512 00 307 0587 00 321 0924 07 321 0414 00 321 0924 07 315 0392 00 321 0318 07 321 0318 07 315 0103 00 315 0103 00 321 0318 07 311 1248 00 315 0510 00 321 0260 09 321 0159 08 315 0105 00 311 1245 00 315 0103 00 307 0587 00 315 0301 00 307 0587 00 307 0587 00 307 0587 00 307 0587 00 315 0680 00 307 0587 00 307 0587 00 307 0587 00 307 0587 00 307 0587 00 307 0587 00 307 0587 00 Part Number Effect Discont Replaceable Electrical Parts 1241 Addendum Part Name amp Description DI 0 047UF 80 202 50V DI 0 047UF 80 20 50V CAP DI 0 047UF 80
66. 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the Z80 microproces sor address data and control lines with a logic analyz er or signature analyzer and verify values listed in Kernel Signature Analysis 1000 LED Error index Troubleshooting and Repair 1241 Addendum Explanation A checksum test on ROM A10U165 began but did not finish Probable Cause Bad ROM A10U160 1FFF LED Error index Action Suspect ROM A10U160 Explanation ROM A10U165 failed the checksum test Probable Cause Bad ROM A10U165 Kernel failure F111 LED Error index Action Suspect ROM A10U165 Move NOP jumper A10J450 to the TEST position pin 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the Z80 microproces address data and control lines with a logic analyz er or signature analyzer and verify values listed in Kernel Signature Analysis Explanation ROM A12U175 failed the complementary byte test This test checks the bytes at FFFChex and to see if they are complementary Probable Cause Diagnostic ROM Failure Kernel failure Action Suspect the diagnostic ROM A12U175 located on the Display Board Move NOP jumper A10J450 to the TEST position pin 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the Z80 microproces Sor address data and control lines with a logic analyz er or signature analyzer and
67. 20905422 150 1061 00 LT EMITTING DIO RED 660NM 50 MAX 50434 1301 409J100 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 409J101 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 4090242 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 0 409467 131 0608 00 TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL 22526 48283 036 409P305 131 2849 00 CONN RCPT ELEC EDGECARD RTANG 2 X 18 0 1 31781 345 036 559 212 09P467 131 0993 00 BUS CONDUCTOR SHUNT ASSEMBLY BLACK 22526 65474 0 4090140 151 0190 00 TRANSISTOR NPN SI TO 92 04713 2 3904 A090141 151 0188 00 TRANSISTOR PNP SI T0 92 04713 2N3906 4090221 151 0190 00 TRANSISTOR NPN 51 TO 92 04713 28394 090249 151 0188 00 TRANSISTOR PNP 51 TO 92 04713 20396 9 138 315 0103 00 RES FXD FILM 10K 5 0 254 19701 10 5 0 25w 9 139 315 0511 00 5 510 OHM 5 0 25W 19701 510 5 0 25w AO9R140 321 0290 00 RES FILM 10 2K OHM 12 0 125W TC T0 91637 CMF55116G10201F A09R141 321 0292 00 RES FXD FILM 10 7K 0HM 12 0 1254 TC TO 91637 CMF55116610701F 2098142 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w 09R145 315 0201 00 RES FXD FILM 200 0HM 52 0 25W 57668 200 5 0 25w AQO9R201 315 0101 00 RES FXD FILM 100 OHM 52 0 25W 57668 100 5 0 25w A09R207 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 57668 100 5 0 25w AOORZ12 307 0446 00 RES NTWK FXD FT 10K OHM 20 9 RES
68. 2N3906 CSCOBA01 680 OR MSPO 5 01 680 OR MSPO 5100 5 0 25w 5100 5 0 25w 5 1 680 OR MSPO CMF55116C400018 CMF55116G20002F CMF55116C400018 3900 5 0 25w CMF55116C20001B CMF55116C20001B 10K 5 0 25w 10K 5 0 25w CMF55116C200018 3386X 1 501 51 5 0 25w CMF55116C49900F CMF55116D442ROF 5 0 25w 3386 DY6 103 10K 5 0 25w CSCOBAO1 680 OR MSPO 300 5 0 25w CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO 68 52 0 25w CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO 5 08 01 680 OR MSPO CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO CSCOBAQ1 680 OR MSPO CSCOBAO1 680 OR MSPO 9 35 Replaceable Electrical Parts 1241 Addendum Tektronix Mfr Component No Part Number Effect Discon Part Name amp Description Code Mfr Part Number ALGR244 321 0414 00 RES FILM 200K OHM 1 0 125W TC TO 91637 CMF55116620002 AL6R247 315 0392 00 RES FXD FILM 3 9K 0HM 52 0 254 57668 3900 5 0 25w A16R248 321 0318 07 RES FXD FILM 20 0K OHM 0 1 0 125W TC T9 91637 0 55116 200018 4168249 315 0103 00 RES FXD FILM 10K OHM 5 0 25W 19701 5 0 25w AL6R250 315 0103 00 RES FXD FILM 10K 51 0 250 19701 10K 5 0 25w A16R252 315 0510 00 RES FXD FILM 51 52 0 254 19701 51 5 0 254 A16R253 315 0182 00 RES FXD FILM 1 8K OHM 5 0 25W 5 668 1800 5 0 25w AL6R255 315 0182 00 RES FXD FILM 1 8K 0HM 51 0 254 57668 1800 5 0 25w 4168256 315 047
69. 380 0384 04 1 HSG HALF ROM PK LID ABS 80009 380 0384 04 12RS11 or 12RS12 32K ROM PACK 46 200 2503 01 2 COVER ROM PACK TOP ABS SMOKE TAN 80009 200 2503 01 ATTACHING PARTS 47 211 0012 00 8 SCREW MACHINE 4 40 X 0 375 PNH STL 93907 ORDER BY DESCRIPTION REV JAN 1990 11 11 Replaceable Mechanical Parts 1241 Addendum Fig amp index Tektronix Serial Number Mfr No Part Number Effect Discont Qty 12345 Part amp Description Code Mfr Part Number END ATTACHING PARTS 4 48 670 7538 00 1 CIRCUIT BD ASSY 32K ROM PACK 80009 670 7538 00 49 136 0 51 00 8 5 ELEK DIP 24 PIN 2 X 12 0 6 X 0 09922 DILB24P108 50 337 3122 00 2 SHIELD ELEC STATIC 80009 337 3122 00 51 200 2504 01 2 COVER ROM PACK BOTTOM ABS SMOKE TAN 80009 200 2504 01 128501 8K RAM PACK 52 200 2503 01 1 COVER ROM PACK TOP ABS SMOKE 80009 200 2503 01 ATTACHING PARTS 53 211 0012 00 4 SCREW MACHINE 4 40 X 0 375 PNH STL 93907 ORDER BY DESCRIPTION END ATTACHING PARTS 54 670 7620 00 10100 013917 1 BD ASSY 8K RAM PACK 80009 670 7620 00 670 7620 01 8013918 1 BD ASSY 8K RAM PACK 80009 670 7620 01 55 337 3122 00 1 SHIELD ELEC STATIC 80009 337 3122 00 56 200 2504 01 1 PACK BOTTOM ABS SMOKE TAN 80009 200 2504 01 1200 01 RS232 COMM PACK 57 380 0343 09 l HSG HALF ROM PK INNER ABS 80009 380 0343 09 ATTACHING PARTS 58 211 0102 00 4 SCREW MACHINE 4 40 X 0 5 FLH 100 DEG STL 93907 ORDE
70. 4320135 281 0775 00 DI 0 1UF 202 50V 04222 5 105 10 A32C146 290 0847 00 CAP FXD ELCTLT 47UF 2 50 202 1OWVDC 55680 TVX1A47 MAA2 A32C149 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 SA105E104MAA A32C245 281 0775 00 DI 0 1UF 20 50V 04222 105 1 2 338 281 0775 00 01 0 10 20 50V 04222 SALO5E 04MAA 3205100 150 1061 00 LT EMITTING DIO RED 660NM 50MA 50434 1301 205300 150 1061 00 LT EMITTING DIO RED 660NM 50MA 50434 HLMP 1301 1320225 151 0190 00 TRANSISTOR NPN SI TO 92 04713 2N3904 1320338 151 0190 00 TRANSISTOR NPN SI 10 92 04713 28394 320345 151 1119 00 TRANSISTOR PHR MOS N CH 100V 5 0A 0 4 OHM 04713 IRFF122 A32R100 315 0221 00 RES FXD FILM 220 0HM 52 0 25W 5 668 220 5 0 25w A32R149 315 0102 00 RES FILM 1K OHM 5 0 25W 57668 1000 5 0 25w A32R300 315 0221 00 RES FXD FILM 220 0HM 52 0 25W 57668 220 5 0 25w A32R310 315 0202 00 RES FXD FILM 2K 0HM 52 0 25W 57668 2000 5 0 25w A32R325 315 0103 00 FILM 10K 59 0 25 19701 10K 5 0 25w 2 336 315 0103 00 RES FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w A32R337 315 0103 00 RES FXD FILM 10K OHM 5 0 25W 19701 10K 5 0 25w 2 3 5 315 0202 00 RES FXD FILM 2K 0HM 52 0 25W 57668 2000 5 0 25w A32U135 156 1444 01 IC PROCESSOR NMOS CONTROLLER GPIB ADAPTER 01295 9914 A32U145 156 0323 02 IC DIGITAL STTL GATE HEX IN
71. 5 3V CAUTION DO NOT DROP V BELOW 5 0 VOLTS MONITOR TP534 IF TP534 RISES ABOVE 290 VOLTS Q534 WILL BE DAMAGED DOES VOLTAGE ON TP430 VARY WITH Va YES LIFT ANODE OF CR337 PROBE TP315 TURN ON INSTRUMENT o Figure 8 2 1241 CRT Drive Board troubleshooting tree cont 8 19 Troubleshooting and 1241 Addendum TROUBLESHOOT FEEDBACK CONTROL LOOP CONT DOES TP315 MOVE TO 10V THEN TO 10V NO SUSPECT U420 CHECK POWER SUPPLIES YES DOES U420 PIN 7 MOVE TO 10V THEN 10 THEN TO TURN INSTRUMENT OFF PROBE U420 O REPLACE U420 PIN 7 TURN INSTRUMENT ON YES TURN OFF INSTRUMENT PROBE TP205 TURN INSTRUMENT ON DOES TP205 MOVE FROM 10V TO 10V NO SUSPECT U207 CHECK POWER SUPPLIES YES REPLACE ANODE OF CR337 15 SUSPECT U431 VR428 422 VR423 PIN 7 AT 30V CR424 VR428 C424 PIN 4 CHECK CIRCUIT 25 CONTINUITY YES DOES U431 PIN 6 CHANGE STATES THEN SETTLE AT OV AS TP430 PASSES THRU OV NO SUSPECT U431 SUSPECT T411 Figure 8 2 1241 CRT Drive Board troubleshooting tree cont 8 20 Troubleshooting and Repair 1241 Addendum _ js Jj NI CH1 GND CH2 GND Figure 8 3 A13TP225 HDRIVE L A13TP456 horizontal flyback
72. 60 Figure 10 1 A13 1241 CRT Drive Board Component Locations REV JAN 1986 Tabie 10 2 CRT LCCS DRIVER O CRT DRIVE BOARD ASSEMBLY A13 CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION C103 F2 E4 R341 D4 C3 C104 F2 E4 R342 D3 C3 C105 F2 E4 R343 4 C2 C111 F 1 4 8345 F1 C3 C113 F2 4 R346 F1 C3 C115 F3 E4 R353 C3 B3 C116 F2 E4 R418 B4 D2 C117 E3 D4 R422 B5 D2 C118 E3 D4 R425 B5 D2 C123 E2 D4 R426 B4 D2 C124 E2 D4 R427 B4 D2 C127 E2 D4 R431 B4 D2 C133 D2 D4 R432 B4 D2 C138 D2 C4 R433 B4 D2 C139 C1 C4 R435 C4 D2 C147 1 4 R452 A3 C2 C148 Ci C4 R466 A2 B2 C152 B3 C4 R467 A2 B2 C153 B3 C4 R533 D1 C168 C2 B4 R535 F3 D2 C201 B5 E3 R540 F3 C2 C202 B5 E3 R541 F3 C2 C204 B5 E3 R552 D5 C1 C205 B5 E4 R553 E5 C1 C213 B5 E3 R554 E5 C1 C214 B5 E3 R555 E5 B1 C215 5 E4 R556 E5 1 C216 5 D4 R557 E5 C220 C5 D4 R562 E5 B1 C223 D5 D3 R565 E5 B1 C224 D5 D3 R566 F5 B1 C225 C4 D4 R567 F5 C226 C3 D3 R568 F5 1 227 C3 D3 R571 F5 B1 C228 D5 D3 R578 F5 A1 C231 C4 D3 R652 F4 B1 C242 B1 C3 R665 E4 B1 C243 D4 C3 T366 E5 B2 C244 F1 C3 T411 B4 E2 C247 B2 C3 T435 E4 C2 C248 B1 C3 T512 E3 D1 C250 C1 C4 TP148 C1 C4 C253 C1 B3 TP205 B5 E4 C317 B4 D3 210 5 4 324 5 D3 TP223 C5 D3 C327 A5 D3 TP224 C4 D3 C328 B4 D3 TP225 C4 D4 C331 A4 D3 TP238 C4 C333 A5 D2 TP242 1 4 341 D4 C3 TP315 B4 D3 C347 E4 C2 TP34
73. 7 16505 1 Ri Rat RQH RSH 1030 Ail CRY TAI3 H e BITI H L CH amp Le H 0155 5 374 EN I OP DISPLAY tell ib ID H N CH YAH RAM INTERFACE 1241 SERVICE 5578 54 DISPLAY RAM SCROLLING CONTROL Table 10 6 VIDEO GENERATION DISPLAY BOARD ASSEMBLY A12 CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC NUMBER LOCATION LOCATION NUMBER LOCATION C100 F2 Al C608 F1 C105 2 A1 C610 F2 C110 F2 A1 C615 F1 C120 FZ B1 C620 F2 C140 F2 C1 C621 F1 C155 F3 D1 C625 F2 C165 F3 D1 C630 170 1 4429 185 1 429 C195 1 P650 E C205 F3 A1 R220 ES C208 F3 Al R295 ES C220 F3 B1 TP225 F2 C230 F3 B1 TP290 F2 C235 F3 C1 TP444 F2 C240 F2 C1 TP476 F2 C245 F2 C1 TP628 F2 C255 F2 D1 TP660 F2 C265 F2 D2 U100A C5 C270 F2 D2 U100F D5 C275 F3 E2 U105C 5 C280 F3 E2 U108A C5 C290 F3 E1 U108D D5 C298 F3 F1 U110C C3 C300 F3 A2 U110F C5 C307 F3 A2 U115A 5 C308 F3 A2 U115C C3 C309 F3 A2 U115D C3 C312 F3 A2 0120 B3 C315 F2 B2 0125 05 C320 F2 B2 U130 C1 C330 F2 C2 U140 B1 C335 F2 C2 U205A A3 C380 F2 E2 U205D C5 C385 F3 E2 U208A D5 C408 F3 U210A D5 C410 F1 A3 U225 D3 C415 F1 B3 U230 D1 C425 F3 C3 U235 E1 C450 F1 D3 U240 C1 C455 F3 D3 U265C D4 C456 F1 D3 U265D D4 C460 F1 D3 U270B D4 C46
74. 80 20 50V CAP FXD CER DI 0 047UF 80 20 50V FXD CER DI 0 047UF 80 20 50V CAP FXD CER DI 0 047UF 80 202 50V CAP FXD CER DI 0 047UF 80 202 50V CAP FXD ELCTLT 5 102 50V DT 0 047UF 80 202 50V DI 0 047UF 80 202 50V CAP FXD CER DI 330PF 20 100V CAP FXD CER DI 0 047UF 80 202 50V CAP FXD CER DI 0 047UF 80 202 50V 01 22 10 100 CAP FXD CER DI 100PF 52 100V CAP FXD CER DI 10PF 102 100V CAP FXD CER DI 22PF 10 100V CAP FXD CER DI 0 047UF 380 202 50V CAP FXD CER DI 22PF 102 100V DI 0 047UF 80 202 50V X 0 225 L Mfr Code 15818 01295 80009 01295 27014 32293 66958 15818 04 13 01295 04713 27014 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 57034 57034 57034 57034 2156 24546 80009 80009 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 Mfr Part Number 426 SN74LS393N3 160 3557 00 TLO72C LF353 1391 1159217 0 11705 426 LM317T TLO72C LF353 MC1436 350 SZG35009K1 SZG35009K1 570350091 1N960_FMLY 1N53 5B 57128158 1N972C 2G275K1 RL 1N991B 1N9918 SZG30025RL CSJ 050 10 CSJ 050 10 CSJ 050 10 CSJ 050 10 61952 OMA 0
75. 91637 MSP10A01 103M OR G A09R214 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 57668 1000 5 0 25w 09R217 315 0101 00 RES FXD FILM 100 OHM 5 0 25W 57668 100 5 0 25w A09R223 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 57668 1000 5 0 25w 09R228 315 0681 00 RES FXD FILM 680 0HM 52 0 25W 57668 680 5 0 25w A09R239 315 0471 00 RES FXD FILM 470 0HM 52 0 25W 57668 470 5 0 25w 1098246 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10 5 0 25w A09R248 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 5 668 100 5 0 25w 098249 315 0511 00 5 510 OHM 52 0 25W 19701 510 5 0 25w AO9RZ50 315 0101 00 RES FXD FTLM 100 0HM 52 0 25M 5 668 100 5 0 25w A09R251 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 5 668 100 5 0 25w A09R252 315 0101 00 5 100 OHM 5 0 25W 57668 100 5 0 25w 2098253 315 0511 00 RES FXD F1LM 510 0HM 52 0 25W 19701 510 5 0 25w AO9R361 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 5 668 100 5 0 25w A09R363 315 0102 00 RES FXD FILM 1K OHM 5 0 25W 5 668 1000 5 0 25w A09R422 307 0503 00 RES 9 510 OHM 20 0 125W 91637 MSP10A01 511G OR CSC A09R423 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 57668 1000 5 0 25w A09R446 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 5 668 100 5 0 25w 9 12 REV JAN 90 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number ADORA49 307 0446 00 RES N
76. A2 R295 05 B1 U308B E4 A2 U100B C1 A1 U310B F4 B2 U100C E4 1 U310C B4 B2 U105A E4 A1 U310D C4 B2 U105B D5 Al U405B D5 A3 U108B B3 Al U405C D3 A3 U108C E2 A1 U405D D5 A3 U110A D5 Al U405E B3 A3 U115B B3 B1 U408 B5 A3 U200A D4 A2 U410C C5 A3 U200B E4 A2 U410E B3 A3 U205B C5 1 U410F B2 A3 U205C C5 A1 U415A F3 B2 U208C E1 A1 U420 B4 B2 U208D D1 A1 U435A D3 C2 U208F E2 Al U480D E2 E2 1172108 B1 U485 B1 E2 U210C C1 81 U495A B2 F3 U220 E1 B2 U495B B2 F3 U265B C5 D2 U495C C2 F3 U270A B2 D2 US60 C1 D3 U275C F2 E2 YG490 A2 F2 SEE PARTS LIST FOR SERIAL NUMBER RANGES GGH F EU SS 2 4 Be RATION E SYNC SIGNAL GENE PRE GT BL L iini HDRIVE L 1 CLOCK DIVIDER 1 COMPONENT NUMBER EXAMPLE 5 U485 USGO 0220 748163 74LS 393 P O Component Number U2O8C ENT 5 Mm 1 A QA 4 UZIOB U208D 74ALS273 74FF04 Pes A23 A2 R1234 7 er asl iuc 74LS08 02080 Bly ale S HDRINE L 27 Ae 4 Schemat Am Bg 74504 U210C y SS tlo al ubassembly Number if used Number la 4 aol Q T CH Chassis mounted components have no Assembly Number NC gt 12 e 8 2 CLR QA 8 Q 3 prefix see end of Replaceable Electrical Parts List e i3 la 12 74 04 9 9495 R
77. AR EER ROE SARS SS SS NINE e I SIBLE Be CEU ANE Dp 1 56122 m eu SA a a dias QUON C101 BO PE 3 i i i hy SAE BB x i TP185 ue 5 i C131 n Mu LS NIE LORE AER DER se ND MP Ati IPRA NE tend RE ostiis TTE n P N 3 ah oyster d i d 3 bg C210 5 E en pHK TONIN CS e EEE 3 SENSO REASONS AREER OE RCE ANB oo US AS T241 A audiam Pags Eo ESA ORAS 05 d Hp EE i M der p H i 8 4 H OK R311 H gentem eas mse GHANIAN ecc ADRS cayu ees as R301 menage to R331 325 H M E i i au
78. B2 F3 U245 D5 C2 A B D E F ROL P O Peso L Aas DG H 22 2 2 2 RASTER COUNTER AND VERTICAL SCROLLING CONTROL 633 Era lt HOCH D E E e asd H aa VRES 1 H 0280 35 HORIVE L 3 R CH 105 9 921758 COMPONENT NUMBER EXAMPLE lt A23 Component Number h 23 TAL CH 7 23 2 R1234 tae TARNE umber Subassembly B22 CH Number if used Number Chassis meunted components have no Assembly Number 21 orefix see end of Replaceable Electrical Parts List ma D 125 0 J amp ee Atel a 11 N 0298 74 453 198 74 5163 HORIZON TAL SCROLLING CONTROL 018 74 8610 i HSEL CL GTMODE H E Ed x 204 MC x e TMODE L ASE PTB GAO 0245 wbli P_2 0145 GlicP 2 IO H 15 GSS BAB INR Oa RA ad OBB oem 4 ej Re oe at RL d INDEX L OE 5 BUF L LC P CH LCE CL BSR R298 NOTE Table 10 1 shows DISPLAY RAM AND ADDRESS MULTIPLEXING Pinout amp nd P O Al2 DISPLAY BD LATS 2764 83 IDG n ECTS 5 ID4CH
79. D0 35 07263 14152 AL3CR273 152 0322 00 SEMICOND DVC DI SCHOTTKY SI 15V 1 2PF DO 35 50434 5082 2811 AL3CR282 152 0323 00 SEMICOND DVC DI SW SI 35V 0 1A D0 7 12954 5282 AL3CR283 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1 152 AL3CR284 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30 00 35 07263 1N4152 AL3CR325 152 0141 02 SEMICOND DVC DI SW ST 30V 150MA 30V 00 35 07263 1N4152 AL3CR332 152 0141 02 SEMICOND DNC DI SW SI 30V 150MA 30V DO 35 07263 1N4152 AL3CR333 152 0400 00 DIODE RECT FAST RCVRY 400V 1A 200NS 1N4936 04713 SR1977KRL AL3CR334 152 0400 00 DIODE RECT FAST RCVRY 400V 1A 200NS 1N4936 04713 SR1977KRL AL3CR337 152 0400 00 DIODE RECT FAST RCVRY 400V 1A 200NS 1N4936 04713 SR1977KRL AL3CR340 152 0066 00 SEMICOND DVC DI RECT SI 400V 1A D0 41 05828 106 020 AL3CR360 152 0661 00 DIODE RECT FAST RCVRY 600V 3A 200NS MRB56 04713 MR856 SEE NOTES AL3CR422 152 0400 00 DIODE RECT FAST RCVRY 400V 1A 200NS 1N4936 04713 SR1977KRL AL3CR424 152 0400 00 DIODE RECT FAST RCVRY 400V 1A 200NS 1N4936 04713 SR1977KRL AL3CR466 152 0066 00 SEMICOND DVC DI RECT SI 400V 1A D0 41 05828 6 106 020 AL3CR521 152 0752 00 SEMICOND DVC DI RECT SI 1A 1500V A50 MED 6 IR5TH81 AL3CR528 152 0661 00 DIODE RECT FAST RCVRY 600V 3A 200NS MRB56 04713 56 SEE NOTES AL3CR552 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1 152 AL3CR622 152 0353 00 SEMICOND DVC DI RECT SI 800V 1W 14099 GP10K 014 13 626 152 0
80. DGTL NMOS 8192 X 8 EPROM W THREE 80009 160 3076 00 ALOVRA17 152 0243 00 SEMICOND 0 01 7 51 15 5 0 44 00 7 04713 5713203 1N965BRL REV JAN 90 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number Al2 670 8689 00 8010100 B010483 CIRCUIT BD ASSY DISPLAY 80009 670 8689 00 Al2 6 0 8689 01 10484 8011626 CIRCUIT BD ASSY DISPLAY 80009 670 8689 01 12 670 8689 02 8011627 CIRCUIT BD ASSY DISPLAY 80009 670 8689 02 2 100 281 0813 00 CAP FXD CER 01 0 0479 202 50 04222 SA105E472MAA 12 105 281 0813 00 DI 0 047UF 20 50V 04222 SA105E473MAA AI2C110 281 0813 00 01 0 0470 20 50 04222 SA105E47 12 120 281 0813 00 DI 0 047UF 20 50 04222 SA105E47 3MAA 12 140 281 0813 00 DI 0 047UF 20 50V 04222 SA105E473MAA Al2C155 281 0813 00 CAP FXD CER DI 0 047UF 20 50V 04222 SA105E473MAA 12 165 281 0813 00 CAP FXD CER DI 0 047UF 20 50V 04222 SA105E473MAA 12 170 281 0813 00 DI 0 047UF 20 50V 04222 SA105E47 3MAA 12 185 281 0813 00 CAP FXD CER DI 0 047UF 20 50V 04222 SA105E473MAA 12 195 281 0813 00 FXD CER DI 0 047UF 20 50V 04222 SA105E47 3MAA Al2C205 281 0813 00 DT 0 047UF 202 50V 04222 SA105E473MAA 2 208 281 0813 00 CAP FXD CER DI 0
81. DI 0 047UF 80 20 50V 04222 15 473 8 16 423 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E4737AB Al6C429 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E47374B 16 430 283 0422 00 01 0 0470 80 20 50 04222 15 4737 Al6C453 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E4737AB Al6C455 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB Al6C463 283 0422 00 01 0 047 80 20 50V 04222 0015 4737 Al6C501 281 0773 00 DI 0 01UF 102 100V 04222 5 201 103 16 502 283 0422 00 DI 0 047UF 480 204 50V 04222 0015 4737 16 507 283 0422 00 01 0 0470 80 20 amp 50V 04222 MD015E4737AB 16 510 283 0422 00 DI 0 047UF 80 20 50V 04222 15 473 16 512 283 0422 00 01 0 0470 80 20 50 04222 15 473 16 517 283 0422 00 CAP FXD CER DI 0 047UF 480 205 50V 04222 0015 473 AL6C520 281 0759 00 CAP FXD CER 01 22 10 100V 04222 SA1014220KAA Al6C521 281 0759 00 CAP FXD CER DI 22PF 102 100V 04222 9 101 22 Al6C522 283 0422 00 CAP FXD CER DI 0 047UF 80 203 50V 04222 MD015E4737AB Al6C523 281 0773 00 DI 0 01UF 102 100V 04222 5 201 103 9 34 REV JAN 90 AI6CR113 Al6CR144
82. Error Indexes the 1241 diagnostic tests are identical to those of the 1240 Refer to the 1240 1241 Logic Analyzer Service Manual for error indexes not discussed in this section The 1241 diagnostic tests provide information describing the operational status of the 1241 Diagnostics performed automatically at power up check out major 1241 circuitry and firmware functions When power up diagnostics are successfully completed the 1241 defaults to the Operation Level menu If failures are detected during power up diagnostics the operator may choose to continue with additional diagnostic tests or bypass the diagnostics if failures are acceptable e g failures in acquisition boards not being used If the 1241 is not able to produce a screen display to summarize power up failure information the service technician must use other methods to troubleshoot the malfunction Table 8 1 outlines the troubleshooting procedures available in this Troubleshooting and Repair section Diagnostic test results are reported using three different menu displays which in hierarchical order are Main Diagnostic automatically displayed at power up if a failure is detected Module Diagnostic and Area Diagnostic Refer to Diagnostic Menu Overview in Section 1 of the 1240 1241 Logic Analyzer Service Manualfor menu details These diagnostic test menus supply the technician with specific error indexes and sometimes test results that point to 1241 troubleshooting informatio
83. GATE TRIPLE 3 INPUT NAND 01295 74510 A12U275 156 0382 02 IC DIGITAL LSTTL GATES QUAD 2 INPUT NAND 01295 741500 Al2U280 156 1172 01 IC DIGITAL LSTTL COUNTER DUAL 4 BIT BINARY 01295 4 SN74LS393N3 Al2U285 156 0989 02 IC DIGITAL LSTTL SHIFT REGISTER 4X4 01295 7415670 Al2U290 156 0679 01 MICROCKT DGTL 4 BIT BINARY ADDER SCRN 01295 7415283 12 295 156 0989 02 IC DIGITAL LSTTL SHIFT REGISTER 4X4 01295 7415670 120298 156 0784 02 IC DIGITAL LSTTL COUNTER SYNCH 4 BIT BINARY 01295 5 7415163 Al2U305 156 0331 03 IC DIGITAL STTL FLIP FLOP DUAL D TYPE 74S74 01295 SN74S74NP3 A12U308 156 0331 03 IC DIGITAL STTL FLIP FLOP DUAL 0 74574 01295 SN7AS7ANP3 A12U310 156 0707 03 IC DIGITAL STTL GATES QUAD 2 INPUT XOR GATE 01295 SN74SB6 NP3 OR JP4 A120400 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 746374 A12U405 156 2158 00 IC DIGITAL ASTTL GATE HEX 2 INPUT OR DRIVER 01205 74AS832A A12U408 156 0541 02 IC DIGITAL STTL DEMJX DECODER DUAL 2 TO 4 01295 SN74LS139N3 2 10 156 0385 02 IC DIGITAL LSTTL GATES HEX INV 74LS04 01295 SN 4LSO4IG A12U415 156 0331 03 IC DIGITAL STTL FLIP FLOP DUAL D TYPE 74S74 01295 SN74S74NP3 A120420 156 0392 03 IC DIGITAL LSTTL FLIP FLOP QUAD D TYPE 01295 SN74LS175N3 AL2U425 156 1313 00 IC DIGITAL LSTTL SHIFT REGISTER 8 BIT PISO 01295 5 7415166 A120430 156 0465 02 IC DIGITAL LSTTL GATES 8 INPUT NAND 74LS30 01295 741530 A12U435 156 0331 03 IC DIGITAL STTL FLIP FLOP DUAL D TYPE 74S
84. INC 2046 SE BROOKWOOD AVE HILLSBORO OR 97123 TK1650 AMP INC 19200 STEVENS CREEK BLVD CUPERTINO CA 95014 2156 ACACIA DEANCO 7763 SW CIRRUS RD BEAVERTON OR 97005 6452 2165 TRIQUEST CORP 3000 LEWIS AND CLARK HWY VANCOUVER WA 98661 2999 TK2278 MANUFACTURING OF OREGON PO BOX 4200 BEAVERTON OR 97076 4200 REV JAN 1990 11 3 Replaceable Mechanical Parts 1241 Addendum Fig amp index Tektronix Serial Number Mtr No Part Number Effect Discont Qty 1245 Part Name amp Description Code Mfr Part Number 1 1 334 4896 01 1 MARKER IDENT MKD 1241 HANDLE 80009 334 4896 01 2 367 0322 00 1 HANDLE CARRY ING 13 800 L SST 80009 367 0322 00 ATTACHING PARTS 3 212 0144 00 2 SCREW TPG TF 8 16 X 0 562 L PLASTITE SPCL 93907 225 38131 012 END ATTACHING PARTS 4 348 0770 00 2 FOOT CABINET BLACK POLYURETHANE 80009 348 0770 00 ATTACHING PARTS 5 211 0504 00 4 SCREW MACHINE 6 32 X 0 250 PNH STL TK0435 ORDER BY DESCRIPTION END ATTACHING PARTS 6 200 2815 00 2 DOOR ROM POLYCARBONATE 80009 200 2815 00 7 334 4754 00 1 MARKER IDENT MKD RECEPTACLE ROM PACK 80009 334 4754 00 8 214 1906 00 2 SPR HLCL TRSN 0 108 OD X 1 25 MUSIC WIRE TKO508 ORDER BY DESCRIPTION 9 351 0696 00 1 GUIDE PROBE POLYCARBONATE SMOKE TAN 80009 351 0696 00 ATTACHING PARTS 10 211 0504 00 2 SCREW MACHINE 6 32 X 0 250 PNH STL 0435 ORDER BY DESCRIPTION END ATTACHING PARTS 11 200 2782 00 1 COVER HOLE 80009 200 2782 00 12 426 191
85. Loop Cathode Z Axis Amplifier Brightness Control Liquid Color Shutter and Driver COMM Pack Power Supply Trig In Level Shift And Buffer Trig Out Level Shift And Buffer DISPLAY BOARD THEORY Overview Clock Divider Select Logic R W Control Wait Circuit I OP Display RAM Interface Sync Signal Generation gt o a n y n g n o a y A n a a gt y n n n kuanua Raster Counter And Vertical Scrolling Control Horizontal Scrolling Control Display RAM And Address Multiplexing Display Mode Control Parallel To Serial Converter 9 C gt 9 gt gt b n a y n a 4 1 4 2 4 2 4 6 4 7 4 7 4 8 4 9 4 9 4 9 4 10 4 10 4 10 4 12 4 12 4 12 4 13 4 13 4 13 4 13 4 13 4 13 4 14 4 15 4 16 4 16 4 16 Section 4 1241 Service Addendum THEORY OF OPERATION OVERVIEW This section provides information on the 1241 Logic Analyzer circuitry Much of the 1241 circuitry is identical to that of the 1240 Logic Analyzer This section is limited to describing circuitry that is unique to the 1241 CRT Drive Display and some Power Supply circuitry Refer to Theory of Op eration in the 1240 1241 Logic Analyzer Service Manual for other circuit descriptions The de
86. Pack ROM If an error is detected it exits to an error routine 1FFF 8 37 Troubleshooting and Repair 1241 Addendum If the ROM checksum test passes the I O Processor attempts communication with the Control Processor If a failure occurs during this attempt the LEDs are set to a circular rotating pattern FFFF If all of the tests have been successfully completed and communication with the Control Processor is achieved the LEDs begin indicating the operating modes of the 1241 KERNEL AREA POWER UP ROUTINE DESCRIPTION Power up resets the Z80 microprocessor and the LED Buzzer Latch A10U335 to initial conditions The microprocessor is vectored to address 0000nex of the diagnostic ROM A10U160 The display registers A12U145 and U245 are initialized and the display is cleared The message DIAGNOS TICS IN PROGRESS is printed on the display screen 0000 LED Error Index with no screen display Explanation All LEDs should be reset ON at power up but a malfunction prevents the LEDs from being lighted Probable Cause Action No power to the 1241 Check the power source and the main fuse Power supply failure Check all power supply voltages LED failure Check all LEDs with an ohmmeter LED latch failure Suspect A10U335 Decoder failure Suspect A10U365 RESET line defective Check RESET line by pressing the RESET switch 105538 and observing pin 26 of U445 1111 LED Error index Explanation All LEDs will be reset ON wh
87. Performance Check Procedures 3A E Test Pattern Generator Performance Check Part 2 Functionality Checks Part 3 Acquisition and System Performance Checks ADJUSTMENT PROCEDURES e uice ed bed aca E ae wa Limits And Tolerances Equipment Required Equipment Alternatives Adjustment Interval Test Sequence Pre Adjustment Procedure 1 CRT Alignment Adjust 5 Display Board Counter Timer Adjust 6 CRT Drive Board External Trigger Adjust Page 4 12 4 12 4 12 4 13 4 13 4 13 4 13 4 13 4 13 4 14 4 15 4 16 4 16 4 16 5 10 Section 6 Section 7 Section 8 1241 SERVICE ADDENDUM TABLE OF CONTENTS cont DISASSEMBLY AND INSTALLATION PROCEDURES OVERVIEW GENERAL DISASSEMBLY INSTALLATION PRECAUTIONS TOOLS REQUIRED PROCEDURE 7 1241 LED PHOTOTRANSISTOR BOARDS arcc ccu Merc PROCEDURE 8 1241 CRT DRIVE BOARD REMOVAL Disassembly Installation Hints
88. RES THERMAL 20K OHM 5 91637 1 28 AY RT311 307 0350 00 RES THERMAL 7 5 0HM 102 3 92 DEG C 15454 75DJ R5RO220SS SIL 7 RV221 307 0663 00 RES V SENSITIVE 330 V 0 25 W 03508 2504 AY RV224 307 0415 00 RES V SENSITIVE DISC 03508 V130LA10A REV JAN 90 9 9 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mtr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number A07RV401 307 0415 00 RES V SENSITIVE DISC 03508 V130LA10A 075100 260 2116 01 SWITCH SLIDE 10A 125VAC POWER 04426 18 100 0007 075401 260 2116 00 SWITCH SLIDE DPDT 10A 125VAC LINE SEL 04426 18 000 0019 4077111 120 1507 00 TRANSFORMER RF TOROID TK1345 120 1507 00 4071141 120 1354 00 XFMR STPDN TRIGGER LF 75498 120 1354 00 A07T211 120 1460 00 TRANSFORMER RF COMMON MODE TK1345 120 1460 00 71241 120 1438 00 XFMR PWR STPDN CONVERTER HIGH FREQUENCY 75498 120 1438 00 4071261 120 1266 00 TRANSFORMER RF TOROID TK1345 120 1266 00 40771431 120 1415 00 TRANSFORMER RF HF DRIVER CONVERTER 75498 120 1415 00 071432 120 0747 00 XFMR TOROID TK1345 120 0747 00 0 TP161 214 0579 00 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION AY TP162 214 0579 00 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION 9 TP171 214 0579 00 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION 07TP172 214 0579 00 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION 173 214 0579 00 TER
89. ROM A10U160 began but did not finish Probable Cause Action Diagnostic ROM failure Suspect diagnostic ROM A10U160 Kernel failure Move NOP jumper A10J450 to the TEST position pin 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the Z80 microproces sor address data and control lines with a logic analyz er or signature analyzer and verify values listed in Kernel Signature Analysis 8 43 Troubleshooting and Repair 1241 Addendum 8 44 1F1F LED Error Index Explanation ROM A10U160 failed the ROM checksum test Probable Cause Diagnostic ROM failure failure 1001 LED Error index Action Suspect diagnostic ROM A10U160 Move NOP jumper A10J450 to the TEST position pin 2 to 3 Remove the resistor pack A10R455 and buzzer disabie jumper A10J315 Check the Z80 microproces sor address data and control lines with a logic analyz er or signature analyzer and verify values listed in Kernel Signature Analysis Explanation A complementary byte test on ROM A10U165 began but did not finish Probable Cause Bad ROM A10U160 1FF1 LED Error index Action Suspect diagnostic ROM A10U160 Explanation ROM A10U165 failed the complementary byte test This test checks the bytes at 3FFChex and to see if they are complementary Probable Cause Bad ROM A10U165 Kernel failure Action Suspect A10U165 Move NOP jumper A10J450 to the TEST position pin
90. Se Y XC 0 AW1dS 0 t JAIOA 6 ssin SH334n8 n son e vrovi nx XNA OGNVdX3 100 O3QIA DNDINY 19 HOH Hi3GOW12 HO1VH3N3O 3NA NNHLYYO iH HIN 6 4 1 4 4 In3sa nowd US HIND SUD 3AIHOA 3 t I HWS 61 ONASI 1 INO 61 i ilz He 6 02 WIA 1 j 7 iip L m i 3000 08 558300 4 315 1 ed 02 tHe x3 S NIT1OH9S 1 1 WVu5via HOO 18 AV 1dSIG 8 58 Troubleshooting and Repair 1241 Addendum module DISPLAY area HSCROLL HORIZONTAL SCROLL AREA TEST DESCRIPTION The horizontal scrolling circuitry is verified by scrolling a diagnostic character horizontally through the diagnostic window A10U295 0190 The I O Processor then reads back a portion of the displayed video from the diagnostic window to verify that it is correct The diagnostic window register is clocked by raster 200 Since it is an 8 bit shift register it will con tain the last eight pixels that were sent to the video monitor before raster 200 occurred Raster 200 is the bottom pixel row of line 25 The character scrolled thro
91. Supply CRT Drive compartment open the rear panel fan does not provide adequate cooling for the Power Supply and CRT Drive Boards An extra fan should be positioned to blow air across these two boards Troubleshooting and Repair 1241 Addendum 1241 TROUBLESHOOTING WITHOUT ERROR INDEXES If the 1241 fails and some part of either the I O Processor or the Control Processor is non functional the 1241 may be unable to produce on screen error messages If this occurs the service technician has available alternative courses for troubleshooting the failure Table 8 1 outlines the troubleshooting procedures available DAMAGE RESULTING FROM INCORRECT BOARD INSTALLATION The following table lists the components that could be damaged when a 1241 board is installed in an incorrect card cage slot In some cases components may not display failure symptoms for some time NOTE If only one board was placed in the wrong slot you need only find component information for that board slot combination However if two boards were incorrectly installed i e two boards placed in each others slots you must find component information for both board slot combinations Table 8 3 POSSIBLE COMPONENTS DAMAGED WHEN A BOARD 15 INSTALLED INCORRECTLY Control or 1 O Display Acquisition Trigger Board Processor Slot Slot Slots Slot Control correct A09U261 0264 A09U261 A09U261 U264 Processor siot A14U150 A14U150 U635 A14U150 Board A14U640 I O Proc
92. TP476 TPB 660 c 4 nere C240 Cas Cios C245 C320 C258 C330 C120 C265 C338 Ty 5V Ci4O C270 C380 5 C278 5 U 2 2 5 gt os E 557 D2375A 1 241459 2 PARALLEL SERIAL CONVERTER ee C298 C455 3 E cios C300 5 C203 CRO C475 74540 c208 C308 C490 UNSC c220 C309 C498 2 E C230 C32 Csse a 3171 2 D u4isel 2 4 P429 74A383 4 iS 74574 E i 17 ac B ilz 1429 a pex a ge D COOSA GIN PS GTMODE 4 DIISA 74 832 PRETT BLENK CL e 74506 0430 UICOA 741530 74504 542 gt SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS OUTLINED TS H 5 OR DEPICTED IN GREY TMODE L GTMODE L IOP LOCK OUT H 5 LOA DC L R220 295 D SV 5 NOTE Table 10 1 shows m Pinout vcc amp Gnd Static Sensitive Devices See Maintenance Section P O AIZ DISPLAY BD 5378 55 VIDEO GENERATION 4 REV FEB 1969 Table 10 7 R W CONTROL SYNC GENERATION DISPLAY BD ASSEMBLY A12 CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION P650 F1 E4 U305A D4 A2 P650 A3 E4 U305B C4 A2 R220 D5 1 U308A E3
93. Tektronix P N 131 1847 00 Tektronix P N 210 0255 00 Tektronix P N 210 0413 00 Tektronix P N 131 1614 00 Tektronix 834 Tektronix P N 013 0173 01 Tektronix 4051 Tektronix 1200C02 GPIB COMM Pack 5 3 Verification and Adjustment Procedures 1241 Addendum 5 4 USING THE 1240 EXTENDER BOARDS 1240 Service Maintenance Kit is used with both 1241 and 1240 Logic Analyzers It contains two extender boards that are used during troubleshooting adjustment and performance verification procedures The first board assembly A21 should be used when working with the trigger display and both processor boards The second board assembly A22 should be used with the 9 and 18 channel acquisition boards Both extenders allow a board under test to be at convenient position away from the other boards so that the signal test points and components are accessible NOTE In some instances extender boards will degrade system performance For complete details refer to the timing limitations in the Specifications section of this manual and to the instruction sheet that accompanies each extender board OPERATING THE 1241 IN THE SERVICE POSITION When operating the 1241 in the service position the card cage rolled up to expose plug in boards some guidelines should be observed The following subsections deal with concerns that arise during 1241 servicing procedures After removal of the rear panel the cooling fan blades are not complete
94. all timebases Setup and hoid values based on 1240D2 with P6460 acquisition probes At max SYNC rate any input event meeting setup and hold times At max SYNC rate recognize any input event meeting setup and hold times Up to 14 different events one per sequence level Timebase period selectabie from 20 ns to 1 s in 1 2 5 increments Timebase period 8ns with 1240D1 samples of word requires 6ns min word width or 8ns with 1240D1 2 11 Specifications 1241 Addendum 2 12 Table 2 3 cont 1240D2 ELECTRICAL SPECIFICATIONS Performance Characteristic Requirements ASYNC events Global event for all channels clocked Timebase period 6 ns 1 0 X unclocked 16 ns min 1 0 X Sequential event Timebase period 6 ns 1 0 PROBE THRESHOLD Threshold range Threshold accuracy with probe 0 5 65 mV Threshold accuracy on card only Supplemental Information Data stored may be different than that re cognized by event recognizer Timebase period 8ns with 1240D1 Minimum width of valid event when giobal filter 1 at 10NS and no 1240D1 channels specified Up to 14 different events one per sequence level Timebase period 8ns with 1240D1 Selectable from 6 35 to 6 35 V in 50 increments also includes preset values for TTL 1 4V TPG 3 70V ECL 1 30 25 of TH 4 8mV measured at probe connector with offset sense conne
95. an instruction cycle Using a signature analyzer the technician may take signatures from the processor kernel circuitry and compare them to predetermined signature values contained in Tables 8 4 through 8 8 In this manner the technician should be able to determine the source of the problem Use the appropriate processor s schematic during kernel troubleshooting to help locate the problem circuitry Start troubleshooting the kernel circuitry by checking the clock Vcc supply and reset line to the microprocessor After placing the processor in a forced NOP loop check the microprocessor address lines to verify that the lines are incrementing indicated by correct signatures After checking CPU signatures continue by verifying address buffer signatures then decoder and finally ROM signatures Processor Kernel Troubleshooting Before starting any troubleshooting procedures ensure that the Z80 CPU on the I O Processor Board is receiving the necessary 5 volts Vcc at A10U445 11 and 4 MHZ clock at U445 6 The fol lowing steps outline the setup procedure necessary for taking signatures on the I O Processor kernel circuitry 1 With the 1241 powered down remove the I O Processor Board and replace it on Extender Board assembly A21 2 Remove the resistor pack A10R455 remove the jumper A10J315 and place jumper A10J450 to the TEST position This puts the processor into a NOP loop Power up the 1241 Remove the P6451 and P6107 probes
96. and controls that may appear to be insulating can render an electric shock vii 1241 SERVICE ADDENDUM viii USE THE PROPER POWER CORD Use only the power cord and connector specified for your product and be sure it is in good condition Refer to the Operating Information section of the 1240 1241 Service Manual for information on power cords and connectors USE THE PROPER FUSE To avoid fire hazard use only a fuse of the correct type voltage rating and current rating as speci fied in the parts list for this product Also ensure that the line selector switch is in the proper posi tion for the power source being used DO NOT OPERATE IN EXPLOSIVE ATMOSPHERES To avoid explosion do not operate this product in an explosive atmosphere unless it has been spe cifically certified for such operation 1241 SERVICE ADDENDUM SERVICE SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY Refer also to the Operator s Safety Summary DO NOT SERVICE ALONE Do not perform internal service or adjustment of this product unless another person capable of ren dering first aid and resuscitation is present USE CARE WHEN SERVICING WITH POWER ON Dangerous voltages exist at several points in this product To avoid personal injury do not touch exposed connections and components while power is on Disconnect power before removing protective panels soldering or replacing components USE CAUTION WHEN SERVICING THE CRT The CRT should be
97. are not occurring suspect A12U408 U205 U265 U410 U105 U200 U110 U405 U305 or U108 Observe the screen with no diagnostic test running If it appears normal i e the soft keys are correctly dis played then the RAM is being written to but cannot be read by the processor If the screen display is garbled and the RAM test is failing the RAM is not being correctly written to Check the duty cycle of the 19 6 MHz clock A12U495 pin 4 It should be between 40 and 60 Check 4 8 MHz L and 2 4 MHz L also All should be square waves Suspect the Green Display RAM A12U245 Suspect A12U155 or U255 Suspect A12U160 U165 U260 U170 125 Power down the instrument Using an ohmmeter check the continuity of the data lines between the two points Power down the instrument Using an ohmmeter check the continuity of the address lines between the two points 8 53 Troubleshooting and Repair 1241 Addendum 8 54 3112 Error index Explanation The data read back was not correct Probable Cause Bad Red Display RAM One or more of the 8 data lines from the Red Display RAM to the Display RAM Read Buffer and or the Write Latch may be open shorted together One or more of the 11 address lines from the Display RAM Address Multi plexer to the Red Display RAM may be open or shorted together Action Suspect A12U145 Power down the instrument Using an ohmmeter check the continuity of the data lines
98. during these Part 1 checks must be within tolerance for this instrument to operate properly It is therefore recommended that the part 1 checks be performed before the Part 2 Functionality Checks and the Part 3 Acquisition And System Performance Checks Table 5 2 SPECIFICATIONS TESTED IN THE PART 1 PERFORMANCE CHECKS NAME VALUE CHECK POWER 16V 15 0 V to 17 75 V A8J658 1 Procedure 1 1 0 V p p max 12V 11 4 V to 12 6 V A8J658 2 Procedure 1 1 V max 5 V 485 V to 5 15 A8J658 3 Procedure 1 100 mV p p max 3V 1 90 V to 2 10 V A8J658 4 Procedure 1 ref to 5 V 100 mV max 5V 4 75 to 5 25 A8J658 5 Procedure 1 200 mV p p max 12V 11 40 V to 12 60 V A8J658 6 Procedure 1 1 V p p max GND 0 00 V ABJ658 7 Procedure 1A COMM PACK POWER SUPPLY 12 V 11 64 V to 12 36 V A13J470 B17 Procedure 1B 1 V p p max DISPLAY High Voltage 12 kV 0 24 kV Anode cup Procedure 2 5 6 Verification and Adjustment Procedures 1241 Addendum Table 5 2 cont SPECIFICATIONS TESTED IN THE PART 1 PERFORMANCE CHECKS NAME VALUE TEST PATTERN GEN Clock Period 83 3 ns 2 A14J620 1 Pulse Width 12 ns 0 5 ns A14J620 1 Amplitude Vout 350 mV min about V th TPG data pins Vth 5V meas 1 30V Nominal V th 3 70 V Glitch Width 6 5ns 1 0ns TPG data pins Delay clock data 1ns 1 50 ns max TPG data pins PROCEDURE 1A 1B POWER SUPPLY PERFORMANCE CHE
99. from the top compartment of the TEKTRONIX 308 Data Analyzer Remove the probe tip P N 206 0252 00 from the top compartment and place it on the P6107 probe Connect the clip lead to 5 V the Vcc pin of a close by TTL 1 C 4 Setthe 308 analyzer s TTL VAR switch to TTL Connect the probes to the signature analyzer and power it on Select the 308 s standard signature mode and connect the P6451 s Clock Start and Stop leads as indicated by the table 5 Tables 8 4 through 8 6 contain Clock Start and Stop polarity settings and signatures for the I O Processor kernel circuitry The polarity settings are taken from test points located on the Processor Board 8 25 Troubleshooting and Repair 1241 Addendum NOTE To ensure a proper signature analyzer setup check the 5 volt and ground signatures against the table being used Control Processor Kernel Troubieshooting Before starting any troubleshooting procedures ensure that the 8088 CPU on the Control Processor Board is receiving the necessary 5 volts Vcc at A9U347 40 and 5 MHZ clock at U347 19 The following steps outline the setup procedure necessary for taking signatures on the Control Processor kernel circuitry 1 With the 1241 powered down remove the Control Processor Board and replace it on Extender Board assembly A21 Remove the resistor pack A9R461 and place jumper A9J467 to the TEST position This puts the processor into a NOP loop Power up the 1241 Remov
100. handled screwdriver simultaneously to the anode connection and to chassis ground When discharging place the screwdriver against the chassis then slip the screwdriver tip under the CRT anode cup 2 Discharge the CRT by simultaneously touching the chassis ground with the plastic handle screwdriver shank and slipping the screwdriver tip under the CRT anode cup see Figure 6 2 3 Unplug the LED PT Board cable and remove the assembly Unplug the anode CRT end cap and the color shutter cable 4 Remove four 6 screws holding the color shutter assembly and remove the shutter Remove the CRT from the front side of the instrument INSTALLATION HINTS f previously removed re install the DAG spring across the back side of the CRT to ensure proper grounding The CRT anode forms a capacitor with the external CRT DAG coating If the DAG spring is not present to ground the CRT hazardous voltages may exist on the outside of the CRT Always replace the color shutter assembly before powering up the instru ment it acts as an implosion shield Disassembly installation Procedures 1241 Addendum SCREWDRIVER ANODE CUP BOTTOM POINTED DOWN Figure 6 2 Discharging a CRT using flat blade screwdriver Push the CRT anode cup back onto the CRT ensuring that the connector prongs are secured in the CRT anode cavity If previously removed re connect the wires to the CRT Drive Board as follows six multi colored wires fo
101. keyboard consisting of numeric entry keys menu selection keys and other controls is located on the 1241 s front panel Acquisition probes and ROM RAM packs are connected on the right side while connections for external triggers and communication packs are made on the rear panel of the instrument Refer to the General Information section of the 1240 1241 Service Manual for a full keyboard description and a menu overview 1241 INSTRUMENT RECONFIGURATION If the specific application for which your 1241 Logic Analyzer was configured changes it may be necessary to change the combination of 1240D1 and 1240D2 acquisition cards installed in the instrument To order additional acquisition cards and probes contact your local Tektronix representative NOTE If you change the 1241 acquisition card configuration a qualified service technician should check the power supply jumper A07J444 to ensure that the 1241 is configured to supply the correct amount of power for the current number of installed acquisition cards To determine the need for a power supply jumper change refer to the Maintenance section of the 1240 1241 Logic Analyzer Service Manual SECTION 2 SPECIFICATIONS SECTION 2 SPECIFICATIONS INTRODUCTION ce eon aes 2 1 PERFORMANCE CONDITIONS 2 1 Section 2 1241 Service Addendum SPECIFICATIONS INTRODUCTION This section contains the following 1241 instrument spec
102. otherwise specified ABBREVIATIONS INCH ELCTRN ELECTRON NUMBER SIZE ELEC ELECTRICAL ACTR ACTUATOR ELCTLT ELECTROLYTIC ADAPTER ELEM ELEMENT ALIGN ALIGNMENT EPL ELECTRICAL PARTS LIST AL ALUMINUM EQUIPMENT ASSEM ASSEMBLED EXT EXTERNAL ASSY ASSEMBLY FIL FILLISTER HEAD ATTEN ATTENUATOR FLEX FLEXIBLE AWG AMERICAN WIRE GAGE FLH FLAT HEAO BD BOARD FLTR FILTER BRKT BRACKET FR FRAME or FRONT BAS BRASS FSTNR FASTENER BRZ BRONZE FT FOOT BSHG BUSHING FXO FIXED CAB CABINET GSKT GASKET CAP CAPACITOR HDL HANDLE CER CERAMIC HEX HEXAGON CHAS CHASSIS HEX HD HEXAGONAL HEAD CKT CIRCUIT HEX SOC HEXAGONAL SOCKET COMP COMPOSITION 5 HELICAL COMPRESSION CONN CONNECTOR HLEXT HELICAL EXTENSION COVER HIGH VOLTAGE CPLG COUPLING INTEGRATED CIRCUIT CRT CATHODE RAY TUBE ID INSIDE DIAMETER DEG DEGREE IDENT IDENTIFICATION DWA DRAWER IMPLR IMPELLER IN INCH SE SINGLE END INCANO INCANDESCENT SECT SECTION INSUL INSULATOR SEMICOND SEMICONDUCTOR INTL INTERNAL SHLD SHIELD LPHLOA LAMPHOLDER SHLOR SHOULDEREO MACH MACHINE SKT SOCKET MECH MECHANICAL SL SLIDE MTG MOUNTING SLFLKG SELF LOCKING NIP NIPPLE SLVG SLEEVING NON WIRE NOT WIRE WOUND SPR SPRING ORDER BY DESCRIPTION 50 SQUARE OD OUTSIDE DIAMETER SST STAINLESS STEEL OVH OVAL HEAD STL STEEL PH BRZ PHOSPHOR BRONZE Sw SWITCH PL PLAIN PLATE T TUBE PLSTC PLASTIC TERM TERMINAL PN PART NUMBER THD THREAD PNH PAN HEAD THK THICK PWR POWER TNSN TENSION
103. repair the faults Table 8 1 RECOMMENDED SERVICING APPROACH Fault Condition _ Servicing Approach 1 No power up 1 Refer to Power Supply Troubleshooting Damage Resulting From Incorrect Board Installation 2 Power up failure 2 Refer to display may not be useable Processor LEDs CRT Drive Board Troubleshooting e Soft Key Troubleshooting Kernel Signature Analysis e Theory of Operation 3 Power up failure 3 Refer to with error indexes e Diagnostic Error indexes Extended Diagnostics with diagnostic ROM pack Diagnostic Block Diagrams 4 General failure 4 Refer to problems not detected during power up Extended Diagnostics with diagnostic diagnostics ROM pack Theory of Operation Troubleshooting Intermittent Failures 1240 Manual Tests Troubleshooting and Repair 1241 Addendum 8 2 TROUBLESHOOTING EQUIPMENT The following equipment or equivalent is recommended for troubleshooting the 1241 Logic Analyzer SONY TEK 308 Data Analyzer e 1240 Service Maintenance Kit 485 Oscilloscope with two P6106 probes USING THE 1240 EXTENDER BOARDS The 1240 Service Maintenance Kit may be used with both 1240 and 1241 Logic Analyzers It contains two extender boards that are used in troubleshooting adjustment and verification procedures The first board assembly A21 should be used when working with the trigger display and both processor boards The second b
104. section for a list of the fuse cap part numbers 1241 POWER SWITCHES The 1241 has two power switches available the front panel POWER DC ON OFF switch and the rear panel MAIN POWER SWITCH refer to Figure 3 1 Both switches must be in the ON position to power up the instrument The front panel power switch controls dc power from the power supply circuitry This switch is normally used by the operator for powering the instrument ON and OFF The rear panel MAIN POWER SWITCH controls the incoming ac line voltage to the 1241 power supply The nonvolatile memory is unaffected by these switches it has a separate battery power source on the Control Processor Board To prolong the life of the 1241 Power Supply components it is recommended that the following guidelines be observed f possible power the 1241 ON and OFF using the front panel DC ON OFF POWER switch lf it is necessary to power up the instrument using the rear panel MAIN POWER SWITCH do so only if the instrument has been powered down for several minutes This allows the internal power supply circuitry to handle current surges POWER UP DIAGNOSTICS To power up the 1241 set the rear panel MAIN POWER SWITCH to ON then push the front panel dc power switch The 1241 internal diagnostic tests run automatically at power up These tests check out major components and operating firmware When power up diagnostics are successfully completed most processor acquisition trigger
105. serviced only by qualified personnel familiar with CRT servicing procedures and precautions CRTs retain hazardous voltages for long periods of time after power down Before attempting any work inside the monitor discharge the CRT by shorting the anode to chassis ground When discharging the CRT connect the discharge path to ground and then the anode Use extreme caution when handling the CRT Rough handling may cause it to implode Do not nick or scratch the glass or subject it to undue pressure during removal or installation When handling the CRT wear safety goggles and heavy gloves for protection REMOVE THE LOOSE OBJECTS During disassembly or installation procedures screws or other small objects may fall to the bottom of the mainframe To avoid shorting out the power supply do not power up the instrument until such objects have been removed GENERAL SECTION INFORMATION SECTION 1 GENERAL INFORMATION Section 1 1241 Service Addendum GENERAL INFORMATION INTRODUCTION The Tektronix 1241 Logic Analyzer is a portable general purpose digital design and troubleshoot ing tool that offers a feature set very similar to that of the 1240 Logic Analyzer Two types of acqui sition cards can be combined in different configurations up to a maximum of four cards The 1240D1 card supports high speed hardware analysis with 9 acquisition channels at 100 MHz 10ns and 6 ns glitch detection The 1240D2 has 18 acquisition channels at 50 MHz an
106. the Red RAM data Only the first line and the area where test results reside are saved The first line of the Red RAM 0000 DO35nex is saved in system RAM at locations B000 e through The test result area D2COnex D57F nex is saved in system RAM locations B040nex through B300nex The Green RAM is tested first then the Red RAM is tested If a failure is detected in the Green RAM the test is aborted and the failure is reported The Red RAM will not be tested until the Green RAM is repaired The pattern AA is written to all locations being tested 000 A7FFne The first location is read and checked for AAnex If contains AAnex it is filled with If it does not contain AAnex the value read is reported as an error and the test is aborted This sequence is repeated for each RAM location under test After the first read write pass has been completed all of the RAM under test should contain The first location is now read and checked for CC e If it contains CChex it is filled with FOnex If it does not contain CC the value read is reported as an error and the test is aborted This sequence is repeated for each RAM location under test After this read write pass has been completed all of the RAM under test should contain FOnex In the next pass the first location is read and checked for FOnex If it contains FOnex it is filled with OF hex If it doesn t contain OF nex the value read is reported a
107. the sweep current magnitude thereby setting the amount of vertical deflection The vertical sync control AR161 is part of an RC timing circuit that produces an exponential voltage at the oscillator input A13U241 9 Adjusting the frequency rate to 120 Hz causes vertical synchronization to occur Vertical linearity is achieved by changing the gain of the power amplifier at the top and the bottom of the screen A13R146 and R151 are used to fine tune the vertical linearity HORIZONTAL SWEEP CIRCUIT lt gt The major parts of the horizontal sweep circuit are the horizontal processor A13U218 the horizontal deflection yoke the S shaping capacitor A13C560 the retrace capacitor A13C447 and the horizontal switching transistor A13Q455 and driver A13U336 These components work together to produce a horizonta deflection current that sweeps the video beam from left to right across the CRT This circuit also produces a flyback signal to the flyback transformer A13T512 The horizontal processor A13U218 provides the drive signal for the horizontal sweep circuit The drive signal a 5 volt square wave output at A13U218 pin 1 is applied to the power MOS FET driver A13U336 The 12 volt output signal from A13U336 is applied to the gate of the horizontal switching transistor 0455 The transistor s output is synchronized to the HDRIVE L signal by means of a phase lock loop internal to the horizontal processor During the first half of the horizontal sweep cu
108. transformer action The drive signal to Q534 is the same signal that is applied to the horizontal switch A13Q455 thus caus ing the flyback on the transformer to occur at the same time that flyback on the horizontal switch occurs The input voltage to T512 is variable thus allowing the anode and grid voltages to be controlled By sensing the anode voltage the input voltage to T512 is varied by the feedback control loop This keeps the CRT anode voltage constant as T512 secondary loads i e the intensity of the display the amount of information on the CRT etc change FEEDBACK CONTROL LOOP 4 The feedback control loop regulates the voltage on the CRT anode The high voltage adjustment A13R325 adjusts the anode voltage to approximately 12 kV The AC voltage from the anode passes through the high voltage potted assembly A13T411 and is sensed by A13U420A The variation in the AC voltage is amplified and filtered by A13U420A U207A and U207B A13R232 and R226 form a voltage divider that limits the magnitude of the signal The pulse width is modulated by A13U236 The output from A13U236 is applied to the power MOS FET driver A13U336 The output signal from A13U336 is applied to the gate of the transformer switch Q334 thus controlling the voltage fed back to the beginning of the feedback loop at A13UT411 A13U420B and U4331 form a loop that filters out the high frequency portion of the anode voltage CATHODE Z AXIS AMPLIFIER BRIGHTNESS CONTROL lt
109. value read back in the diagnostic window will appear to be shifted left by two after each scroll operation To make the verification algorithm as simple as possible the character is scrolled once horizontally before it is read the first time The data sequence expected from the diagnostic window register is 1 7 ESnex 8F nex When the test has been completed the original contents of the Display RAM are restored Troubleshooting and Repair 1241 Addendum 3310 Error Index Explanation Before each read of the diagnostic window register a 60 Hz interrupt must occur In this case the 60 Hz interrupt did not occur and the diagnostic test was not run Probable Cause 60 Hz interrupt is not working correctly 3311 Error index Action Press the processor RESET switch to cause the power up diagnostics to run This will establish that the default 60 Hz interrupt is working Since the I O Processor INTERRUPT test has already been run before reaching this point the failure is proba bly caused by writing different values to A12U420 If the INTERRUPT test passes loop on the VSCROLL test and check A12U420 U310 and U105 Explanation While horizontally scrolling the diagnostic character an incorrect pattern was read back The pattern expected was F1hex Probable Cause The Horizontal Scrolling Registers are defective The Low Address Counter is defective The Display Formatter Latch is d
110. verify values listed in Signature Analysis 8 45 Troubleshooting and Repair 1241 Addendum 8 46 F11F LED Error Index Explanation ROM A12U175 failed the checksum test Probable Cause Diagnostic ROM Failure Kerne failure Action suspect the diagnostic ROM A12U175 located on the Display Board Move NOP jumper A10J450 to the TEST position pin 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the Z80 microproces sor address data and control lines with a logic analyz er or signature analyzer and verify values listed in Kernel Signature Analysis Troubleshooting and Repair 1241 Addendum 9 8 69 jaway 1055 0044 O I 702 8 aunbiy 8 HOSS3OOHd ua43ng TON viva H LSUI WINOO 1 1353 0981 WWOD 06658 200 000 Zai oal 4344NG u32zng viva SILSONSVIG 13S3H ossn WOH MWOHD 8 9210 0674 8 ds Su3d0903g 087 1 13S3H envy C Sven Tt vH HMI Stu333n8 SSaquaav Su333n8 5 WWOYD DO3HNS osen ay ozsn 003HN X201 SA OVI Siva ove Sivda ovg 39915 WOVd NWOO WvuSvia oo1g A3NU35 HOSS3OOUd 8 47 Troubleshooting and Repair 1241 Addendum 8 48 KERN
111. 0 8010483 1 CIRCUIT BD ASSY DISPLAY 80009 6 0 8689 00 670 8689 01 010484 011626 1 CIRCUIT BD ASSY DISPLAY 80009 670 8689 01 670 8689 02 8011627 1 CIRCUIT BD ASSY DISPLAY 80009 670 8689 02 96 214 1337 00 2 PIN SPRING 0 25 X 0 103 OD STL CD PL TK0858 ORDER BY DESCRIPTION 97 105 0160 04 2 EJECTOR CKT BD YELLOW PLASTIC 80009 105 0160 04 REV JAN 1990 11 9 Replaceable Mechanical Parts 1241 Addendum 48283 036 65474 006 253 0135 01 670 7526 15 670 7526 16 ORDER BY DESCRIPTION 105 0160 04 DILB40P 108 ORDER BY DESCRIPTION 48283 036 65474 006 DILB16P 108T DILB28P 108 670 7527 15 ORDER BY DESCRIPTION 105 0160 04 DILBAOP 108 253 0135 01 DILB28P 108 DILB16P 108T 48283 036 65474 006 345 036 559 212 ORDER BY DESCRIPTION 351 0695 00 670 7528 07 821 01655 024 082 2543 5010 082 3643 5510 TEKTRONIX SPECS Fig amp index Tektronix Serial Number Mfr No Part Number Effect Discont Qty 12345 Part Name amp Description Code Mfr Part Number 3 98 131 0608 00 23 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD P 22526 99 131 0993 00 1 BUS CONDUCTOR SHUNT ASSEMBLY BLACK 22526 100 253 0135 01 1 PLASTIC STRIP VINYL 0 062 X 0 5 X 80009 101 670 7526 15 8010100 8010323 1 CIRCUIT ASSY 1 0 PROCESSOR 80009 670 7526 16 010324 1 CIRCUIT BD ASSY I O PROCESSOR 80009 102 214 1337 00 PIN SPRING 0 25 L X 0 103 OD STL CD PL 858 103 105 0160 04 2 EJECTOR CKT BD YELLOW PLASTIC 80009 1
112. 0 D4 C3 C348 F1 C3 TP344 E4 C2 C357 E5 B3 TP372 E5 B3 C371 E5 B3 TP430 A5 D2 C421 B5 D2 TP456 D3 B2 C424 B4 D2 TP524 E4 D1 C425 B4 D2 TP534 E3 Di C429 B4 02 TP551 4 C2 C445 E4 C2 TP565 A3 B2 C447 E5 C2 TP569 F4 1 C460 A2 B2 TP630 4 01 465 2 2 TP636 E4 C1 C467 A2 B2 TP650 F4 B1 C520 E3 D2 U117 E3 D4 C528 E4 D1 U123A E2 D4 C537 E3 C1 U123B E2 D4 C543 E4 C1 U134 D2 D4 C544 E4 C1 0138 02 C4 C545 F3 C2 U207A B5 E3 C547 F3 C2 U207B B5 E3 C548 4 Ct U218 C4 E3 C554 E5 C1 U236 D4 D3 555 1 11241 1 C4 C557 E5 B1 U336 D4 C3 C560 A3 B2 U347 F1 C3 C566 F5 B1 U420A B5 D2 C567 E5 B1 U420B B4 D2 C569 E5 B1 U431 B4 D2 C625 E3 D1 U465 A2 B2 C635 EA Gi VR116 D4 CR115 EZ D4 VR122 E2 D4 CR121 1 D4 VR126 E2 D4 CR125 E2 D4 VR321 A5 D3 CR233 B5 D3 VR336 E4 c3 CR247 B1 C3 VR423 85 02 CR325 4 D3 VR428 B4 D2 CR332 A5 D3 VR510 B4 Back of Bd CR333 A5 D2 VR530 E4 D2 CR334 A5 D2 VR531 E3 D2 CR337 E4 C3 VR533 E3 D1 CR340 1 C3 VR565 E5 1 CR360 5 83 W219 not shown 1 CR422 B4 D2 W239 not shown E1 CR424 B4 D2 W254 not shown E1 W268 not shown E1 CR466 2 2 W512 C3 E1 CR521 D2 SEE PARTS LIST FOR SERIAL NUMBER RANGES COMM PACK POWER SUPPLY F468 5 CR 6G 0405 LMASOT 6144 L OOF VULIN TOP RISI IOO lt RIST CiS8 vs 470K 41 el HORNE L REO 05241 RIGT CT OA ti70 5 220
113. 0 OHM 202 0 125W 91637 MSP10A01 511G OR CSC 58490 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w Al5R530 315 0620 00 RES FILM 62 0HM 52 0 25W 19701 62 5 0 25w AL5R531 315 0151 00 RES FXD FILM 150 OHM 52 0 25W 57668 150 5 0 25w 58532 315 0151 00 RES FXD FILM 150 0HM 52 0 25W 57668 150 5 0 25w AL5R533 315 0620 00 RES FXD FILM 62 OHM 52 0 25W 19701 62 5 0 25w 156534 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w 58535 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w AI5R536 315 0200 00 RES FXD FILM 20 52 0 25 19701 20 5 0 25w AL5R538 307 0488 00 RES NTWK FXD F1 5 100 0HM 202 0 75W 91637 MSPO6AO1 1D1G OR CSC AL5R546 307 0488 00 RES NIWK FXD FI 5 100 OHM 20 0 75W 91637 MSPO6A01 1D1G OR CSC AL5R556 307 0488 00 RES NTWK FXD FI 5 100 0HM 202 0 75W 91637 MSPO6A01 1D1G OR CSC AL5R565 307 0486 00 RES NTWK FXD FT 100 OHM 20 1 125W 91637 MSP10A01 101J OR G C AL5R5 O 307 0489 00 RES NTWK FXD FI1 7 100 0HM 202 1 0M 91637 MSPOBA 01 101J OR G AL5R575 307 0489 00 RES NTWK FXD FT 7 100 0HM 202 1 0W 91637 MSPOBA 01 101J OR G Al 5R600 307 0445 00 RES NIWK FXD FI 4 7K OHM 20 9 RES 91637 MSP10A 01 472G J K 0 AL5R630 307 0489 00 RES NTWK FXD F1 7 100 0HM 202 1 04 91637 MSPOBA 01 101J OR G Al51P185 131 0608 00 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL 22526 48283 036 AL5TP250 131 0608 00 TERMINAL 0 365 X 0 025 PH BRZ GOLD PL 22526 48783 036 AL5TP291 131 0608 00 TERMIN
114. 00 CAP FXD ELCTLT 800UF 50 10 50V 56289 674D807HO50JJ5A 7 165 290 0804 00 CAP FXD ELCTLT 10UF 50 20 25V 55680 UVXIEIOOMAA 07C171 290 0800 00 CAP FXD ELCTLT 250UF 100 10 20V 56289 6720257H0200M5C I07C172 290 0932 00 FXD ELCTLT 390UF 100 102 15VDC 56289 6720676 A07C173 290 0845 00 CAP FXD ELCTLT 330UF 50 10 25V 54473 ECE A25V330L 07 181 290 0944 00 CAP FXD ELCTLT 220UF 50 20 10V 55680 UVXIC221MPA 7 187 290 0804 00 ELCTLT 10UF 50 20 25V 55680 UVXIE1OOMAA 7 188 290 0943 00 CAP FXD ELCTLT 47UF 50 202 25V 55680 UVX1V47OMPA 07 189 290 0804 00 CAP FXD ELCTLT 10UF 50 20 25V 55680 UVXIEIOQMAA 407C210 285 1302 00 CAP FXD PLASTIC O 22UF 201 250V 61058 ECQ E2A224M4 AJ C211 285 1196 00 FXD PPR DI 0 O1UF 202 250V TK0515 PME 265 510 A07C212 285 1196 00 CAP PPR 01 0 010 202 250V TK0515 PME 265 510 7274 283 0204 00 CAP FXD CER 01 0 01 20 50 18796 RPEL1075U102M50V 107276 283 0203 00 CAP FXD CER DI 0 47UF 20 50V 18796 RPE113X7R474MO50V 407C278 290 0804 00 CAP ELCTLT 10UF 50 20 25V 55680 UVXIEIO0MAA 07 279 283 0177 00 CAP FXD CER 01 80 20 2 18796 113750105750 9 6 REV JAN 90 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number 407 281 281 0775 00 CAP FXD C
115. 00 OHM TAPPED 7 SIP DELAY LINE ELEC 10NS 100 OHM 7 SIP DELAY LINE ELEC 10NS 100 OHM TAPPED 7 SIP DELAY LINE ELEC 5NS 100 OHM TAPPED DELAY LINE ELEC 10NS 100 OHM TAPPED 7 SIP 555 55555 SSS DELAY LINE ELEC 10NS 100 OHM TAPPED 7 SIP TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL CONN RCPT ELEC CKT BD 50 CONT MALE CONN RCPT ELEC CKT BD 50 CONT MALE TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSEMBLY BLACK BUS CONDUCTOR SHUNT ASSE
116. 0009 253 0135 01 8 343 0549 00 4 STRAP TIEDOWN E 0 091 W X 4 0 L 06383 PLTIM 79 131 2663 00 1 CONN RCPT ELEC PWR 3 MALE 250VAC 6A 82389 EAC 303 ATTACHING PARTS 80 211 0244 00 2 SCR ASSEM WSHR 4 40 X 0 312 PNH STL CD PL 01536 821 02775 81 210 0586 00 2 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 211 041800 00 END ATTACHING PARTS 82 204 0 6 00 1 BODY FUSEHOLDER 3AG amp 5 X 20MM FUSES 3629 TYPE FAU 031 3577 83 196 1157 01 1 LEAD ELECTRICAL 18 5 5 1 5 4 TK1386 ORDER BY DESCRIPTION BA 200 2264 00 1 CAP FUSEHOLDER FUSES 3629 FEK 031 1666 85 337 3097 00 1 SHIELD ELEC YOKE 80009 337 3097 00 ATTACHING PARTS 86 211 0661 00 3 SCR ASSEM WSHR 4 40 X 0 25 PNH STL POZ 01536 821 01655 024 87 210 0586 00 2 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 211 041800 00 ATTACHING PARTS 88 6 0 7523 10 B010100 B010883 1 CIRCUIT BD ASSY TRIGGER 80009 670 7523 10 6 0 7523 11 BO10884 1 CIRCUIT BD ASSY TRIGGER 80009 670 7523 11 89 214 1337 00 2 PIN SPRING 0 25 L X 0 103 OD STL CD PL TKO858 ORDER BY DESCRIPTION 90 105 0160 04 2 EJECTOR CKT BD YELLOW PLASTIC 80009 105 0160 04 91 131 0608 00 100 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD P 22526 48283 0 92 131 2221 00 1 CONN RCPT ELEC CKT BD 50 CONT MALE 22526 65626 10 93 131 0993 00 13 BUS CONDUCTOR SHUNT ASSEMBLY BLACK 22526 65474 06 94 253 0135 01 1 PLASTIC STRIP VINYL 0 062 X 0 5 X 80009 253 0135 01 95 670 8689 00 01010
117. 016 140235 156 1700 01 IC MEMORY ECL SRAM 16 X 4 6NS 01 16 3 04713 10H145 140240 156 1642 01 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT 04713 101105 140245 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 140250 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 140255 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 140260 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 Al4U265 156 1641 01 IC DIGITAL ECL GATES QUAD 2 INPUT NOR 04713 10H102 A14U270 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 Al4U275 156 1647 00 IC LINEAR BI POLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 Al4U280 156 1647 00 IC LINEAR BI POLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 140285 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 4140290 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 41295 156 11 02 IC DIGITAL LSTTL BUS TRANSCEIVER OCTAL 01295 SN74LS245N3 AL4U315 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 140320 156 1642 01 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT 04713 10H105 A14U325 156 1682 00 IC DIGITAL ECL GATE DUAL 4 5 INPUT OR NOR 04713 10H109 A14U330 156 1700 01 IC MEMORY ECL SRM 16 X 4 6NS DIP16 3 04713 104145 140333 156 1700 01 IC MEMORY ECL SRAM 16 X 4 685 DIP16 3 04713 109145 A14U335 156 1700 01 IC MEMORY ECL SRAM
118. 016 AL5U260 156 1641 01 IC DIGITAL ECL GATES QUAD 2 INPUT NOR 04713 101102 Al5U265 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 Al5U270 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74 374 9 32 REV JAN 90 A15U275 A15U290 150295 150300 A15U310 AL5U315 A15U320 A15U330 A15U335 A15U340 A15U345 A15U350 A15U355 A15U390 A15U410 A15U415 A150420 A150425 A150430 A150435 A150440 AL5U445 A15U450 A15U455 A15U475 A15U480 A15U490 A15U495 A15U500 A15U510 A15U520 A15U535 A15U540 511545 AL5U550 AL5U555 150560 150565 A1505 0 A1505 5 A15U580 A15U590 A150595 A15U630 150635 6 6 101 16 102 16 103 16 110 16 117 16 129 16 136 Al6C142 Al6C143 16 144 Al6C145 Al6C146 REV JAN 90 Component No Tektronix Part Number 156 1327 00 156 0385 02 156 1191 01 156 0579 02 156 1712 00 156 0543 01 156 1712 00 156 1712 00 156 1712 00 156 1639 01 156 1674 00 156 1641 01 156 1639 01 156 0784 02 156 1685 00 156 1685 00 156 0543 01 156 1685 00 156 0543 01 156 1685 00 156 1642 01 156 1710 00 156 1733 00 156 1795 00 156 1327 00 156 1277 00 156 0734 02 156 0734 02 155 0270 00 155 0270 00 155 0270 00 156 1733 00 156 1710 00 156 1639 01 156 1639 01 156 1710 00 156 1639 01 156 0 43 01 156 0743 01 156 0743 01 670 7703 07 QR 4 3 SERERE B
119. 019 09 263 0019 09 263 0019 09 263 0019 09 Serial Number Effect Discont Replaceable Electrical Parts 1241 Addendum Part Name amp Description SEMICOND DVC ST 100M4 TO 18 SEMICOND PH NPN ST 100M4 TO 18 RES FXD CMPSN 1M OHM 5 0 125W RES FXD CMPSN 1M 5 0 125 CIRCUIT BD ASSY LED 1 NOT AVAIABLE ORDER 672 1130 00 SEMICOND DVC DI LED GAAS 1 5M4 TF 100MA SEMICOND DVC DI LED GAAS 1 5MW 100 SEMICOND DVC DI LED GAAS 1 5MW TF 100MA SEMICOND DVC DI LED GAAS 1 5M4 IF 100MA SEMICOND DVC DI LED GAAS 1 5M4 TF 100MA CIRCUIT BD ASSY LED 2 NOT AVAIABLE ORDER 672 1130 00 SEMICOND DVC DI LED GAAS 1 SMW IF 100MA SEMICOND DVC DI LED GAAS 1 5MW CIRCUIT BD ASSY KEYBOARD DI 0 047UF 202 50V DI 0 047UF 202 50V CAP FXD CER DI 0 047UF 202 50V DI 0 047UF 202 50V CER DI 0 047UF 202 50V CAP FXD CER DI 0 047UF 202 50V CAP FXD ELCTLT 47UF 50 20 25 CAP FXD CER DI 0 047UF 202 50V FXD ELCTLT 47UF 50 20 25V CAP FXD CER DI 0 047UF 202 50V CAP FXD CER DI 0 047UF 202 50V CAP FXD CER DI 0 047UF 202 50V DI 0 047UF 202 50V CAP FXD CER DI 0 047UF 202 50V LT EMITTING DIO ORANGE 635NM 35MA MAX LT EMITTING DIO ORANGE 635NM 35MA MAX LT EMITTING DIO ORANGE 635NM 35MA MAX LT EMITT
120. 01UF 10 100V 04222 SA201C103KAA 407CA08 285 1302 00 CAP FXD PLASTIC 0 22UF 20 250V 61058 ECQ E2A224M 07 410 285 1302 00 PLASTIC 0 22UF 20 250V 61058 ECO F2A224W 407 411 290 0944 00 CAP ELCTLT 220UF 50 20 10V 55680 UVXIC221MPA 076427 290 0944 00 CAP FXD ELCTLT 220UF 50 202 10V 55680 UVX1C221MPA 4070445 281 0812 00 DI 1000PF 10 100V 04222 101 10 AO7CABI 290 0818 01 CAP FXD ELCTLT 390UF 100 10 40V 00853 301ER391U04082 7 60 290 0877 00 CAP FXD ELCTLT 1200UF 100 10 6 3V 56289 6720371 5 290 0844 00 _ CAP FXD ELCTLT LOQUF 75 20 35WVDC 54473 ECE A35V100L 07 472 290 0845 00 CAP FXD ELCTLT 330UF 50 102 25V 54473 ECE A25V330L A07C487 290 0944 00 FXD ELCTLT 220UF 50 20 10V 55680 UVX1C221MPA AOTCRI51 152 0333 00 SEMICOND DVC DI SH SI 55V 200MA D0 35 07263 FDH 6012 52 152 0333 00 SEMICOND DVC DI SW S1 55V 200MA DO 35 07263 FDH 6012 AO7CR153 152 0333 00 SEMICOND DVC DI SW SI 55V 200MA DO 35 07263 FDH 6012 AOTCR154 152 0333 00 SEMICOND DVC DI W SI 55V 200MA DO 35 07263 FDH 6012 AOTCR211 152 0750 00 SEMICOND DVC DI RECT BRIDGE ST 600V 83003 PB66F PPR60 A07CR251 152 0398 00 DIODE RECT FAST RCVRY 200V 1A 200NS 1N4935 04713 1N4935 A07CR252 152 0398 00 DIODE RECT RCVRY 200V 1A 200NS 1N4935 04713 1N4935 AOT CR253 152 0655 00 SEMICOND DVC DI RECT ST 100V 3A 03508 Al15AX39 A
121. 03 19 0000 16 0001 20 0001 A10U125 21 ON 1 52F8 22 0001 2 HC89 23 0001 3 2H70 24 0001 4 9840 25 0001 5 9840 26 0001 6 HPPO 27 E 7 8A03 28 0001 8 0000 29 0000 9 A305 30 UUUU A10U270 10 CFP2 31 5555 1 11 4FU3 32 CCCC 2 12 7C4A 33 7F7F 3 13 6351 34 5 21 4 14 35 OAFA 5 15 APCS 36 UPFH 6 16 0001 37 52 8 7 38 89 8 39 2H70 9 40 10 Indicates that the Probe Tip 206 0252 00 was not connected to the P6107 probe when the signature was taken 8 27 Troubleshooting and Repair 1241 Addendum Table 8 5 I O SIGNATURES DECODERS AND BUFFERS OUTPUTS Clock F J280 1 5Volts 0001 Start I J280 9 GND 0000 Stop J J280 9 Location Signature Location Signature A10U380 A10U340 1 3C96 9 755P 2 3827 10 3827 3 755P 15 3C96 4 0000 16 HAP7 5 0000 A10U345 6 0001 3 HPPO 7 F2A6 5 2H70 8 0000 7 HC89 9 PCO1 12 OAFA 10 12U3 14 UPFH 11 4POA 16 52F8 12 P255 18 1293 13 U3H5 A10U350 14 0996 3 15 6H49 5 CCCC 16 0001 7 5555 9 UUUU 12 5 21 14 0001 16 0000 18 0000 8 6 I O SIGNATURES ROM DATA LINES Clock J J280 1 5 Volts P254 Start 1 UXXX 20 GND 0000 Stop T UXXX 20 Location Signature Location Signature Location Signature A10U160 A10U170 A10U185 11 813P 11 11 C6AP 12 F9U4 12 12 H8A4 13 02A8 13 13 0P31 15 P38A 15 15 8321 16 268C 16 16 7F8A 17 2790 17 17 UOAB 18 48P5 18 18 HU18 19 3913 19 19 C750 A10U165 A10U180 11 1636 11 12 C2UU 12 13 62U5 13 15 1513 2 15 16
122. 04 136 0757 00 1 SKT PL IN ELEK MICROCIRCUIT 40 DIP 09922 105 214 0579 00 14 TERM TEST POINT BRS CD PL TKO858 106 131 0608 00 53 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD P 22526 107 131 0993 00 2 BUS CONDUCTOR SHUNT ASSEMBLY 22526 108 136 0729 00 1 SKT PL IN ELEK MICROCKT 16 CONTACT 09922 109 136 0 55 00 5 SKT PL IN ELEK MICROCIRCUIT 28 DIP 09922 110 670 7527 15 1 CIRCUIT BD ASSY CONTROL PROCESSOR 80009 111 214 1337 00 2 PIN SPRING 0 25 X 0 103 OD STL CD PL 858 112 105 0160 04 2 EJECTOR CKT BD YELLOW PLASTIC 80009 113 136 0757 00 1 SKT PL IN ELEK MICROCIRCUIT 40 DIP 09922 114 253 0135 01 2 PLASTIC STRIP VINYL 0 062 X 0 5 X 80009 115 136 0755 00 8 SKT PL IN ELEK MICROCIRCUIT 28 DIP 09922 116 136 0729 00 1 SKT PL IN ELEK MICROCKT 16 CONTACT 09922 117 131 0608 00 41 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD P 22526 118 131 0993 00 1 BUS CONDUCTOR SHUNT ASSEMBLY BLACK 22526 119 131 2849 00 1 CONN RCPT ELEC EDGECARD RTANG 2 X 18 0 1 31 81 ATTACHING PARTS 120 211 0016 00 2 SCREW MACHINE 4 40 X 0 625 PNH STL TK0435 END ATTACHING PARTS 121 351 0695 00 1 GUIDE ROM PACK POLYCARBONATE TEK BLACK 80009 122 670 7528 07 1 CIRCUIT BD ASSY INTERFACE 80009 ATTACHING PARTS 123 211 0661 00 4 SCR ASSEM WSHR 4 40 X 0 25 PNH STL POZ 01536 END ATTACHING PARTS 124 131 2401 00 2 CONN RCPT ELEC 2 X 25 MALE TK1483 125 131 1857 00 1 TERM SET PIN 36 0 025 SQ PIN ON 0 1 CTR
123. 04713 10H109 AQBU500 156 1682 00 IC DIGITAL ECL GATE DUAL 4 5 INPUT OR NOR 04713 10H109 AQBW100 175 9256 01 CA ASSY SP ELEC 10 22 AWG 10 0 L RIBBON 54422 PER TEKTRONIX SPECS A0BW110 175 9256 01 ASSY SP ELEC 10 22 AWG 10 0 L RIBBON 54422 PER TEKTRONIX SPECS A0B120 175 9256 01 CA ASSY SP ELEC 10 22 AWG 10 0 L RIBBON 54422 PER TEKTRONIX SPECS A0BW130 175 9256 01 CA ASSY SP ELEC 10 22 AWG 10 0 L RIBBON 54422 PER TEKTRONIX SPECS A9 670 7527 15 CIRCUIT BD ASSY CONTROL PROCESSOR 80009 670 7527 15 150 146 0041 00 B010100 10444 BATTERY DRY 2 8 0 65AH LITHIUM 00681 3440LP ADOBT150 146 0041 01 B010445 BATTERY DRY 2 8 0 65AH LITHIUM 00681 3440DE OR 600 A09C105 283 0422 00 DI 0 047UF 480 202 50V 04222 MDO15E47 374B A9C110 283 0422 00 DI 0 047UF 80 20 50V 0422 0015 4737 A09C115 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E473748 ADOC120 283 0422 00 CAP FXD CER DI 0 047UF 480 202 50V 04222 MD015E4737AB A09C125 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E47 374B A9C130 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 0015 4737 A09C135 283 0422 00 DI 0 047UF 80 20 50V 04222 0015 4732 A09C140 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E47374B 9 145 290 0367 00 7OUF 20 6V NONPOLARI ZED 55289 3001802 A09C 160 283 04
124. 055514 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 55516 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 055519 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 1055526 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 4055528 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 055536 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 4050135 156 0140 00 IC DIGITAL TTL BUFFER DRIVER HEX BUFFER OC 01295 7417 4050135 156 0140 02 IC DIGITAL TTL BUFFER DRIVER HEX BUFFER OC 01295 7417 05205 156 0513 00 IC MISC CMOS ANALOG MUX 8 CHANNEL CD4051 04713 A05U205 156 0513 02 MICROCKT DGTL CMOS ANALOG MUX DEMUX 04713 MC14051BCLD 105U239 156 0956 02 IC DIGITAL LSTTL BUFFER NONINV OCTAL LINE 01295 54741524483 050328 156 0738 04 IC DIGITAL STTL FLIP FLOP HEX D TYPE CLEAR 01295 SN74S174N3 0555 156 1245 00 MICROCKT LINEAR 7 XSTR NPN SI HV HICH CUR 04713 MC1413P 4050529 156 0756 00 IC DIGITAL CMOS DEMUX DECODER BCD TO 04713 4028 050529 156 0756 01 IC DITITAL CMOS DEMUX BINARY DECODER SCRN 04713 4028 407 670 7534 15 CIRCUIT BD ASSY PWR SPLY 80009 670 7534 15 4070101 285 1302 00 CAP FXD PLASTIC 0 22UF 20 250 61058 ECQ E2A224Md 70121 290 1015 00 CAP FXD ELCTLT 1000UF 100 102 200V 00853 DOM102W200AA2PC 7 122 283 0178 00 CAP FXD CER DI 0 1UF 202 100V 04222 SR211C104MAA 07 131 290 1015 00 CAP FXD ELCTLT 10000 100 1023 200V 00853 DOM102W200AA2PC 07 161 290 0901
125. 05S300 263 0019 39 SWITCH PB ASSY MOMENTARY 80009 263 0019 39 4055304 263 0019 39 SWITCH PB ASSY MOMENTARY 80009 263 0019 39 055313 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 055318 263 0019 09 SWITCH ASSY MOMENTARY 80009 263 0019 09 1055328 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 1055332 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 055342 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 4055402 263 0019 39 SWITCH PB ASSY MOMENTARY 80009 263 0019 39 1055410 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 055414 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 55415 263 0019 09 SWITCH PB ASSY MOMENTARY 80000 263 0019 09 1055419 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 1055425 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 1055429 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 4055433 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 4055435 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 055438 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 9 055444 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 1055500 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 055500 263 0019 39 SWITCH ASSY MOMENTARY 80009 263 0019 29 55504 263 0019 09 SWITCH PB ASSY MOMENTARY 80009 263 0019 09 055504 263 0019 39 SWITCH PB ASSY MOMENTARY 80009 263 0019 39 055511 263 0019 09 SWITCH PB ASSY MOMENTARY 80000 263 0019 09 1
126. 09Sn MOVd WOO 200 000 625 Zai oai 161 001 SQ31 8 27 viva QILSONSDVIA 8 IVNOILOSHIOCIa ossn 8 9210 T 8 sy300930 087 13S3u Maw Wau ONY Syn 583430 553 osen 2 ws 42012 GIYA 8 0 8 Suddang 5 0 50 9L s9sn OVI 51 8 0 8 L 39V1S WVH5VIG 13NH3X 55300 4 O I Troubleshooting and 1241 Addendum 8 40 Troubleshooting and Repair 1241 Addendum KERNEL AREA RAM ROUTINE DESCRIPTION The first RAM routine tests the 2K BOOOne B7FFhex A10U150 1101 LED Error Index Explanation The LED 05534 will be turned off after the message DIAGNOSTICS IN PROGRESS is written to the screen and the RAM test is entered Probable Cause Action RAM Test failed to run or finish Suspect the diagnostic ROM A12U175 located on the Display Board Kernel failure Move NOP jumper A10J450 to the TEST position pin 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the Z80 microproces sor address data and control lines with a logic analyz er or signature analyzer and verify values listed in Kernel Signature Analysis Bad address decoder Suspect A10U
127. 1 R5 5 5181 5235 100 102 102 11 W121 W125 REV JAN 90 Component No Tektronix 315 0102 00 131 0566 00 307 0696 00 307 0446 00 315 0103 00 315 0103 00 315 0511 00 315 0102 00 307 0542 00 315 0102 00 131 0566 00 307 0696 00 307 0540 00 315 0201 00 156 1632 00 156 1632 00 156 3061 00 156 1632 00 156 3348 00 156 1632 00 156 3348 00 152 0744 00 152 0744 00 670 7538 00 281 0775 00 281 0775 00 119 1725 01 159 0151 00 159 0017 00 311 0604 00 260 1849 02 311 2193 00 156 1610 00 160 2001 02 156 1610 00 160 2028 02 156 1610 00 160 1574 02 156 1610 00 160 2002 02 154 0885 01 175 9077 00 175 8228 00 175 8371 00 Part Number Serial Number 10100 8013918 8013918 8013918 8013918 8010100 010100 010100 010100 010100 8013918 8013918 8013918 8013918 010100 010100 8013918 010100 8013918 8010100 8013918 8010100 8013918 Effect Discont B013917 B013917 B013917 B013917 B013917 B013917 B013917 B013917 B013917 B013917 B013917 Replaceable Electrical Parts 1241 Addendum Pari Name amp Description RES FXD FILM 1K 01M 52 0 25M BUS CONDUCTOR DUMMY RES 0 094 OD X 0 225 L RES 7 10 OHM 2 0 15W EACH RES NIWK FXD FI 10K 20 O RES RES FXD FILM 10K 0HM 52 0 25W RES FXD FILM 10K 0HM 52 0 25W RES FXD FTLM 510 OHM 5 0 25
128. 1 00 RES FXD FILM 470 OHM 5 0 25W 57668 470 5 0 25w ALGR258 315 0392 00 RES FXD FILM 3 9K OHM 5 0 25W 57668 3900 5 0 25w ALGR261 315 0102 00 RES FXD FILM 1K 52 0 25W 57668 1000 5 0 25w AL6R300 315 0680 00 RES FXD FILM 68 OHM 51 0 254 57668 68 5 0 254 168301 315 0680 00 RES FILM 68 0HM 52 0 254 57668 68 5 0 25 ALGR302 315 0301 00 RES FXD FILM 300 OHM 5 0 25W 57668 300 5 0 25 AL6R304 315 0680 00 RES FILM 68 OHM 5 0 25W 57668 68 5 0 25w 168318 307 0896 00 80009 307 0896 00 168320 307 0587 00 RES NTWK FXD FI 7 68 OHM 20 0 125W 91637 5 08 01 680 OR MSPO 168323 307 0587 00 RES NTWK FXD FI 7 68 OHM 20 0 125W 91637 CSCOBA01 680 OR MSPO A16R326 307 0587 00 RES NTWK FXD FI 7 68 OHM 20 0 125W 91637 CSCOBA01 680 OR MSPO 16 330 307 0587 00 RES NTWK FXO FI 7 68 OHM 20 0 125W 91637 CSCOBAO1 680 OR MSPO AL6R332 315 0132 00 RES FILM 1 3K 0HM 51 0 25 57668 1300 5 0 25w AL6R333 315 0680 00 RES FXD FILM 6B OHM 51 0 25W 57668 68 5 0 254 A16R335 315 0132 00 RES FXD FILM 1 3K 0M 51 0 254 57668 1300 5 0 25w ALGR344 307 0587 00 RES NTWK FXD F1 7 68 OHM 20 0 125W 91637 CSCOBA01 680 OR MSPO ALGR351 307 0598 00 RES NTWK FXD FI 7 330 OHM 2 1 0W 91637 5 013310 OR CSCO A16R353 315 0511 00 RES FXD FILM 510 OHM 5i 0 25M 19701 510 5 0 25w A16R355 315 0102 00 RES FILM 1K OHM 5 0 25W 57668 1000 5 0 25w 16 356 315 0331 00 RES FXD FILM 330
129. 1 W VALLEY VIEW LN W N ST 1240 WOLCOTT ST 515 FISHING CREEK RD 2040 15TH AVE WEST 2100 EARLYWOOD DR 2900 SEMICONDUCTOR DR 630 E LAMBERT RD 2222 WELLINGTON COURT 20 RAILSIDE RD 8081 WALLACE RD 1600 NW WASHINGTON BLVD 118 NORTHEASTERN BLVD ONE PANASONIC WAY 70903 COOPER BELDEN ELECTRONICS WIRE AND CABLE 2000 S BATAVIA AVE 71468 ITT CANNON SUB OF HOUSEHOLD INTERNATIONAL CORP 72653 GC ELECTRONICS CO 73 43 FISCHER SPECIAL MFG CO 74868 AMPHENOL CORP 78189 ILLINOIS TOOL WORKS INC 80009 TEKTRONIX INC 81483 INTERNATIONAL RECTIFIER 82389 SWITCHCRAFT INC 8471 BOYD CORP 8044 CALIFORNIA GASKET CORP 85928 SEASTROM MFG CO INC 91500 ASHEVILLE SCHOONMAKER MICA CO 91637 DALE ELECTRONICS INC 93907 TEXTRON INC 98978 INTERNATIONAL ELECTRONIC RESEARCH CORP 53109 FELLER 93629 SCHURTER AG H WRIGHT ENGINEERED PLASTICS INC 11 2 666 DYER RD PO BOX 1209 1801 MARGAN ST 111 INDUSTRIAL RD 1 KENNEDY AVE ST CHARLES ROAD 14150 SW KARL BRAUN DR 9220 SUNSET BLVD 5555 ELSTRON AVE 13885 RAMOMA AVE 1601 W 134 ST 701 SONORA AVE 910 JEFFERSON AVE 2064 12TH AVE 600 18TH AVE 135 W MAGNOLIA BLVD PO BOX 7704 72 Veronica Ave 2015 SECOND STREET 10350 OLD REDWOOD HWY HARRISBURG PA 17105 DALLAS TX 75265 ROCKFORD IL 61108 LISLE IL 60532 PHOENIX AZ 85008 4229 WEST BRIDGEWATER MA 02379 CHATSWORTH CA 91311 5911 TINLEY PARK IL 07094 2917 NEW HAVEN CT 06515 1238 LOS ANGELES CA 90039 2410 BRO
130. 10 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E473ZAB Al6C215 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E4737AB 16 220 283 0422 00 DI 0 047UF 480 202 50V 04222 MD015E4737A4B A16C222 283 0422 00 DI 0 047UF 480 202 50V 04222 MD015E473ZAB Al6C223 283 0422 00 CAP FXD CER DI 0 047UF 480 204 50 04222 MD015E47374B AL6C23A 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E4737AB 16 243 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E47374B 16 244 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MDO15E4737AB 16 245 283 0422 00 CAP FXD CER DI 0 04 UF 80 20 50V 04222 MD015E4737AB Al6C246 281 0773 00 CAP FXD CER 01 0 010 10 100 04222 SA201C103KAA Al6C247 283 0422 00 CAP FXD CER DI 0 047UF 80 202 5ON 04222 MD015E4737AB Al6C252 281 0773 00 CAP FXD CER DI 0 01UF 102 100V 04222 5 201 103 16 254 283 0422 00 DI 0 047UF 480 204 50 04222 0015 4737 Al6C263 283 0422 00 CAP FXD CER DI 0 047UF 480 202 50V 04222 MD015E4737AB AL6C264 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E4737AB AL6C267 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 015 473 AL6C303 283 0422 00 CAP FXD CER DI 0 047UF 480 202 50V 04222 MD015E4737AB AL6C308 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MDO15E473ZAB 16 311 283 0422 00
131. 11 ROM A10U160 failed byte complement test Bad ROM A10U160 1010 Began checksum test on ROM A10U160 but did not finish Bad ROM A10U160 1F1F ROM A10U160 failed checksum test Bad ROM A10U160 1001 Began complementary byte test on A10U165 but did not finish Bad ROM A10U160 1FF1 ROM A10U165 failed byte complement test Bad ROM A10U165 1000 Began checksum test on ROM A10U165 but did not finish Bad ROM A10U160 Troubleshooting and Repair 1241 Addendum I O PROCESSOR KERNEL LED ERROR SUMMARY Led Status Probable Cause 1FFF ROM A10U165 failed checksum test Bad ROM A10U165 F111 ROM A12U175 on the Display Board failed byte complement test Bad ROM A12U175 F11F ROM A12U175 on the Display Board failed checksum test Bad ROM A12U175 0101 COMM pack cannot be accessed Bad COMM pack ROM F1F1 COMM pack ROM failed checksum test Bad COMM pack ROM FFFF All LEDs are flashing in a circular rotating pattern This indicates a communica tion failure between the I O Processor and the Control Processor Suspect A10U485 U580 U585 U590 U575 and U595 0 off 1 on F flashing MSB LSB LED Position O LED Number A10DS538 536 534 532 Initially the instrument has no power applied 0000 When the instrument power is turned on the LEDs are also turned 1111 280 microprocessor is vectored to ROM A10U160 1110 The display registers A11U280 and U285 are initialized the display screen is cleared
132. 1103 02 11 13 FIG 5 ACCESSORIES SECTION 1 2 GLOSSARY Section 12 1241 Service Addendum GLOSSARY With the exception of the following signals the 1241 uses the same signal names as the 1240 Re fer to section 12 the 1240 1241 Logic Analyzer Service Manual Signal Name Description HDRIVE L Horizontal drive signal from the Display Board to the CRT Drive Board used to sychronize the raster counter operations on the Display Board with the display monitor operations on the CRT Drive Board VDRIVE GREEN H Video drive signal from the Display Board to the CRT Drive Board used to synchronize the display monitor s vertical sweep 12 1
133. 1186 00 TRANSISTOR PWR MOS N CH 400V 8 04 0 55 04713 MTHEN40 130534 151 1147 00 TRANSISTOR PWR MOS N CH 350V 5 5A 1 0 OHM 04713 IRF731 130558 151 0190 00 TRANSISTOR NPN SI TO 92 04713 2N3904 A130563 151 0711 00 TRANSISTOR NPN SI TO 928 04713 MPSH10 FMLY A130564 151 0439 00 TRANSISTOR NPN SI X 51C 27014 400 136103 315 0220 00 RES FXD FILM 22 0HM 52 0 25W 19701 22 5 0 25w AI3R104 315 0220 00 RES FXD FILM 22 0HM 52 0 25W 19701 22 5 0 25w AI3R107 315 0220 00 RES FXD FILM 22 52 0 25 19701 22 5 0 254 AL3R108 315 0153 00 RES FILM 15K 0HM 52 0 25W 19701 15K 5 0 25w ADR113 315 0220 00 RES FXD FILM 22 0HM 52 0 25W 19701 22 5 0 254 13 114 315 0153 00 RES 15 OHM 5 0 25W 19701 15K 5 0 2594 13 115 315 0303 00 RES FILM 30K OHM 52 0 25W 19701 30K 5 0 25w Al3R118 315 0510 00 RES FXD FILM 51 52 0 25 19701 51 5 0 25w AL3R120 315 0303 00 RES FILM 30K 5 0 25 4 19701 30K 5 0 25w AL3R123 315 0510 00 RES FXD FILM 51 0HM 52 0 25W 19701 51 5 0 25w A13R125 315 0303 00 RES FILM 30K 0HM 52 0 25W 19701 30K 5 0 25w 138138 307 0542 00 RES NIWK FXD F1 5 10K 52 0 125 91637 CSCO6A01 103J OR G A13R140 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w 141 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w AI3R142 315 0153 00 RES FXD FILM 15K 0HM 52 0 25W 19701 15K 5 0 25w A13R143 315 0474 00 RES FXD FILM 470K O
134. 131 AL2U615 156 1676 00 IC DIGITAL ECL GATE TRIPLE 2 INPUT EXOR NOR 04713 10H107 120620 156 1642 01 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT 04713 10H105 12 445 158 0106 00 XTAL 077 100 17 0 0025 SERIES 33096 CCAT505029 AL2YGA90 119 1502 00 OSCILLATOR RF 19 6608M47 14 DIP PKG 01537 RASCO 2 19 6608MH 13 670 8688 00 010100 8010127 CIRCUIT BD ASSY CRT DRIVE 80009 670 8688 00 670 8688 01 8010128 010182 CIRCUIT BD ASSY CRT DRIVE 80009 670 8688 01 A3 670 8688 02 8010183 8010540 CIRQUIT BD ASSY CRT DRIVE 80009 670 8688 02 A3 670 8688 03 B010541 CIRQUIT BD ASSY CRT DRIVE 80009 6 0 8688 03 AL3C103 283 0067 00 01 0 0010 102 200V 18796 DDO9B10 Y5F 102K 200 13 104 283 0067 00 CAP FXD CER 01 0 00 10 200V 18 96 0009810 Y5F 102K 200 AL3C105 283 0212 00 CAP FXD CER DI 2UF 202 50V 18 96 RPE114 75U 205M50V 13 111 283 0212 00 CAP FXD CER DI 2UF 20 50V 18796 RPE114 Z5U 205M50V 13 113 283 0067 00 CAP FXD CER DI 0 001UF 102 200V 18796 0009810 Y5F 102K 200 AL3C115 283 0067 00 DI 0 001UF 102 200V 18796 DDO9B10 Y5F 102K 200 AL3C116 283 0212 00 DI 2UF 202 50V 187 RPE114 Z5U 205M50V 13 117 283 0100 00 DI 0 0047UF 102 200V 04222 SR302A472KAA AL3C118 283 0177 00 CAP FXD CER 01 80 20 25 18796 RPE11375U0105750V AL3C123 283 0100 00 DI 0 0047UF 102 200V 04222 SR302A472KAA 13 124 283 0177 00
135. 152 0793 00 SEMICOND DVC DI DUAL RECT SI 40V 25A 81483 95 4564 152 0793 00 SEMICOND DVC DI DUAL 51 40 25 81483 95 4561 REV JAN 90 9 7 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number A07CR461 152 0794 00 SEMICOND DVC DI RECT SI 10A 30V 10 220 81483 1210030 A07CRA71 152 0141 02 SEMICOND 0 01 54 51 30 150 30V DO 35 0 200 1MI5E A07CR472 152 0141 02 SEMICOND DNC DT SW SI 30 150MA 30V D0 35 07263 184152 A07CR481 152 0141 02 SEMICOND DVC DT SW ST 30 150MA 30V D0 35 07263 1N4152 0705121 150 0035 00 LAMP GLOW 90V MAX 0 3MA AID T WIRE LD 213 JH005 3011JA 79100 131 0589 00 TERMINAL PIN 0 46 L X 0 025 SQ PH BRZ GLD 22526 48283 029 07J110 131 0589 00 TERMINAL 0 46 L X 0 025 SQ PH BRZ GLD 22526 48283 029 7120 131 0589 00 TERMINAL 0 46 L X 0 025 SQ BRZ GLD 22526 48283 029 79130 131 0589 00 TERMINAL PIN 0 46 L X 0 025 SQ GLD 22526 48283 029 074145 131 0589 00 TERMINAL PIN 0 46 L X 0 025 SO BRZ GLD 22526 48283 0290 79181 131 0589 00 TERMINAL 0 46 L X 0 025 SQ BRZ GLD 22526 48283 029 407 J301 131 2663 00 CONN RCPT ELEC PWR 3 MALE 250VAC 82389 303 79444 131 0589 00 TERMINAL 0 46 X 0 025 SQ PH BRZ GLD 22526 48283 029 1115 108 0708 00 COIL RF FIXED 75NH TK1345 108 0708 00 71151 10
136. 156 1794 00 156 1639 01 156 1642 01 156 1639 01 156 16 6 00 156 1641 01 156 1794 00 156 1 19 00 156 1639 01 156 1639 01 156 16 6 00 158 0255 00 670 7524 09 IC DIGITAL 4 WIDE IC DIGITAL ECL GATE QUAD 2 INPUT AND SCRN IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL LSTTL DEMUX DECODER 3 T0 8 IC DIGITAL ECL GATES QUAD 2 INPUT NOR IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL 2 WIDE 2 3 INPUT IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 IC DIGITAL ECL FLIP D TYPE MASTER IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT IC DIGITAL ECL GATES QUAD 2 INPUT NOR IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL GATES QUAD 2 INPUT NOR IC DIGITAL ECL GATES 2 INPUT NOR IC DIGITAL ECL OR NOR SCRN IC DIGITAL ECL GATE QUAD 2 INPUT AND SCRN IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL COUNTER 4 BIT BINARY 10HO16 IC DIGITAL LSTTL DEMJX DECODER 3 TO 8 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGI TAL ECL 4 TO 1 10H1 4 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL GATE DUAL 4 5 INPUT OR NOR IC DIGITAL ECL GATE QUAD 2 INPUT AND SCRN IC DIGITAL ECL GATE TRIPLE 2 INPUT EXOR NOR IC MEMORY ECL SRAM 16 X 4 6NS 01 16 3 IC DIGITAL ECL GATES QUAD 2 INPUT
137. 163 19701 32997 91637 91637 57668 19701 57668 5 668 5 668 19701 57668 57668 19701 57668 19701 91637 91637 54937 75498 54937 22526 22526 22526 858 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 15818 24K 5 1 0w SPH 1 OHM 5 PERCENT CMF55116G10002F 4700 5 0 25w CMF55116G19102F CMF55116G50001F 9100 5 0 25w 4700 5 0 25w CMF55116G10001F 1000 5 0 125w 200 5 1 0w CMF55116G133R0F CMF55116611500F 470K 5 0 25w 3386N HV2 255 CMF65 426474J CMF65 426474J 6800 5 0 25w 10 54 0 25w 270 5 0 25w 100K 5 0 25w 3900 5 0 25w 43 5 0 25w 470 5 0 25w 56 5 0 25w 15K 5 0 25w 330K 5 0 25w 10K 5 0 25w 100 5 1 0w RS2B B12000F 120 1652 00 119 2066 00 119 2066 01 120 1653 00 48283 036 48283 036 48283 036 ORDER BY DESCRIPTION 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 426 9 23 Replaceable Electrical Parts 1241 Addendum Component No A130123 AL3U134 A13U138 30207 A13U218 A13U236 AL3U241 A13U336 AL3U347 A13U420 A130431 A13U465 AL3VR116 ALSVR122 AL3VR126 AL3VR321 AL3VR336 AL3VR423 AL3VR428 AL3VR510 AL3VR530 AL3VR531 AL3VR533 AL3VR565 A134219 3239
138. 181 175 3232 00 ASSY SP ELEC 2 26 AWG 12 0 L RIBBON 80000 175 3232 00 W87 175 2423 00 CABLE ASSY RF 50 OHM COAX 5 0 L 80009 175 2423 00 189 196 3060 00 LEAD ELECTRICAL 26 AWG 5 5 L 2 M 80009 196 3060 00 45 175 2632 00 ASSY SP ELEC 3 26 AWG 3 0 L 75 ORDER BY DESCRIPTION 288 175 5113 00 CABLE ASSY RF 50 OHM 5 5 1 9 4 80009 175 5113 00 W548 136 0842 00 SOCKET ASSEMBLY 54422 ORDER BY DESCRIPTION W575 174 0003 00 CA ASSY SP ELEC 3 26 AWG 6 5 L RIBBON TK2156 61640 9 42 REV JAN 90 SECTION 1 0 DIAGRAMS DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS Symbols Graphic symbols and class designation letters are based on ANSI Standard Y32 2 1975 Logic symbology is based on ANSI Y32 14 1973 in terms of positive logic Logic symbols depict the logic function per formed and may differ from the manufacturer s data Active low signals are indicated by an L following the signal name or by a horizontal line above the signal name 0 IRQ Signal names without indicators are considered active high Some active high signals are indicated by an H follow ing the signal name Abbreviations are based on ANSI Y1 1 1972 Other ANSI standards that are used in the preparation of diagrams by Tektronix Inc are Y14 15 1966 Drafting Practices Y14 2 1973 Line Conventions and Lettering 10 5 1968 Letter Symbols for Quantities Used in Electrical Science and Electrical Engineering American National
139. 1K 0HM 52 0 25W 57668 1000 5 0 25w AL2R505 307 0587 00 RES NTWK FXD FI 7 68 OHM 20 0 125W 9163 CSCOBAO1 680 OR MSPO AL2R510 307 0587 00 RES NIWK FXD FI 7 68 205 0 125 91637 CSCOBAO1 680 OR MSPO 126530 307 0587 00 RES NTWK FXD FI 7 68 20 0 125 91637 5 08 01 680 OR MSPO 2575 307 0811 00 RES NTWK FXD FT 6 180 0HM 6 270 OHM 9163 16 45 AL2R600 307 0587 00 RES NTWK FXD FT 7 68 OHM 20 0 125W 91637 5 08 01 680 OR MSPO AL2R630 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 57668 100 5 0 25w 12 225 131 0608 00 TERMINAL PIN 0 365 X 0 025 BRZ GOLD PL 22526 48783 036 12 290 131 0608 00 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL 22526 48283 036 12 425 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48783 036 12 444 131 0608 00 TERMINAL 0 365 X 0 025 PH BRZ GOLD PL 22526 48283 036 12 476 131 0608 00 TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL 22526 48283 036 9 16 REV JAN 90 Tektronix Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number 12 626 131 0608 00 TERMINAL 0 365 L X 0 025 BRZ GOLD PL 22526 48283 036 12 628 131 0608 00 TERMINAL 0 365 L X 0 025 BRZ GOLD PL 22526 48283 036 AlZTP660 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 4120100 156 0323 02 IC DIGITAL STTL GATE HEX INV 74S04 DIP14 3 01295 7450 Al2U105 156 0739 02 IC DIGITAL STTL GATES Q
140. 2 C357 C371 R334 C341 0556 4551 i m R340 EM ae R346 CRAB 21 w268 7X4 224 T v w219 R278 C27 TON C247 pes de 2 57 R277 A268 70246 R2g amp R277 Xa KA lt R333 CR264 277 q273 9267 1 4224 We czas P238 252 R222 KEIN a CR203 C266 7 CR247 Re386 R231 C226 aont S212 I i ia 120 R282 4274 Us R246 C242 0237 0236 c231 R226 R228 R rE 218 ene Lo CR262 pur iens R245 77 TP242 R237 X R225 R 67 lt eRe1 EM 205 R281 oes E27T rco R231 poeta TP225 225 C220 x eaim C285 een 18275 975774 4265 C258 R256 ia R206 os C278 pe R154 x u C124 Cite 160 2189 8285 417 79 9174 E 68 T n 0154 mE SRI TPI78 R173 155 TP148 qi R161 cis2 RIA R187 C142 I RIT 78176 095887 eee 8166 EM 1 27 41 R186 18176 pm R C127 125 117 RI85 pu 716 R156 RISI R146 s NRI VRii 9110 0105 0100 R175 9175 91725 8120 R235 e a 115 R113 R187 C184 R184 R183 C183 0125 2 1117 R123 C139 C116 Citt e i n C133 5 cies 5378
141. 2 ONLY IC MEMORY CMOS PROM 8K X 8 PRGM 156 4003 00 12RDOl ONLY DGTL NMOS 8192 X 8 EPROM 128512 ONLY IC MEMORY CMOS PROM BK X 8 PRGM 156 4003 00 12RD01 ONLY ELECTRON TUBE W YOKE ASSY SP ELEC 2 26 AWG TW PR 2 T 0 N 12 0 ASSY SP ELEC 50 28 25 0 L RIBBON ASSY SP ELEC 34 28 AWG 27 0 L RIBBON Mfr Code 5 668 24546 91637 91637 19701 19701 19701 57668 91637 5 668 24546 91637 91637 5 668 61772 61772 01295 61772 61892 61772 61892 04713 04713 04222 04222 TK1456 75915 75915 12697 31918 61058 80009 80009 TK1375 80009 22526 Mfr Part Number 1000 52 0 25w OMA 07 5 011030 MSP10A01 103M OR G 10K 52 0 25w 10K 5 0 25w 510 5 0 25w 1000 5 0 25w 5 06 01 103 OR G 1000 5 0 25w OMA 07 5 1 10306 MSPO6A 01 102 G J OR 200 5 0 25w 6116LP 6116LP SN 74HC8EN 6116LP UPD43256AC 15L 6116LP UPD43256AC 151 SZC30619RL 1N747A F SZC30619RL 1N747A F 670 7538 00 SA105E104MAA SA105E104MAA 4112 KX 314007 312 004 381 CM40258 601005 EWT XAK01950B 68766 160 2001 02 68766 160 2028 02 68766 160 1574 02 68766 160 2002 02 154 0885 01 175 9077 00 175 8228 00 80610 002 9 41 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number W
142. 20 281 0813 00 01 0 047 20 50 04222 SA105E47 3MAA 12 330 281 0813 00 01 0 047 20 50 04222 SA105E473MAA 12 335 281 0813 00 DI 0 047UF 202 50V 04222 SA105E473MAA AL2C380 281 0813 00 DI 0 047UF 202 50V 04222 SA105E473MAA 12 385 281 0813 00 01 0 0470 20 50 04222 SA105F473MAA 12 400 283 01 8 00 01 0 10 20 100 04222 SR211C104MAA 12 405 281 0813 00 D1 0 047UF 20 50V 04222 SA105E473MAA 12 406 281 0813 00 DI 0 047UF 20 50V 04222 SA105E473MAA AL2CA08 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SA105E473MAA 12 410 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MDO15E4737AB 12 415 283 0422 00 CAP FXD CER 01 0 0470 480 20 50 04222 15 473 A120423 283 0775 00 01 1764 PF 12 500V 09023 CD19FD 1764 FOB Al2C425 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E47 374B 12 445 283 0422 00 01 0 0470 480 20 50 04222 MD015E473ZAB 12 446 281 0811 00 CAP FXD CER DI 10PF 102 100V 04222 SA101A100KAA 12 450 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E473ZAB Al2C455 283 0422 00 DI 0 047UF 480 202 50V 04222 MDO015E47 37AB Al2CA56 283 0422 00 D1 0 047UF 480 202 50V 0
143. 202 50V 01 0 0470 80 20 50 01 0 047 80 20 50 DI 0 047UF 80 202 50V 4 10 35 SEMICOND DVC DI SW SI 30V 150MA 30V 00 35 SEMICOND DVC DI SW SI 30V 150 30V 00 35 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 SEMICOND DVC DI SW SI 30V 150 30V DO 35 SEMICOND DVC DT SW SI 150 30V DO 35 SEMICOND DVC DI 5 51 15 1 2 00 35 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 SEMICOND DVC DI SW SI 30V 150MA 30V 00 35 SEMICOND DVC DI SW SI 30V 150 30 00 35 SEMICOND DVC DI SW SI 30V 150MA 30V DO 35 SEMICOND DVC DI 5 51 15 1 2 00 35 SEMICOND DVC D1 SW SI 150 30V DO 35 COIL RF FIXED 2 2UH COIL RF FIXED 2 2UH TRANSISTOR NPN ST TO 92 TRANSISTOR PNP ST TO 92 RES NTWK FXD FT 7 68 20 0 1254 RES NTWK FXD FT 7 68 OHM 202 0 125W RES FXD FILM 5 1K 5 0 25 RES FXD FILM 5 1K 0HM 52 0 25W RES NTWK FXD FT 7268 0HM 202 0 125W RES FXD FILM 40K OHM 0 12 0 125W TC T9 RES FXD FILM 200K OHM 1 0 125W TC TO RES FXD FILM 40K 0HM 0 12 0 1254 TC T9 RES FXD FILM 3 9K 0HM 52 0 25W RES FXD FILM 20 0K 0HM 0 12 0 1254 TC T9 RES FXD FILM 20 0K 0HM 0 12 0 125W TC T9 RES FXD FILM 10K OHM 5 0 25W RES FXD FILM 10K OHM 5 0 25W RES FXD FIUM 20 0K 0 1 0 1254 1 19 RES VAR NONWW TRMR 500 0HM O 5W
144. 22 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E47374B A9C167 283 0422 00 DI 0 047UF 480 202 50V 00222 MD015E47374B 9 200 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MDO15E473ZAB A09C207 283 0422 00 CAP FXD CER DI 0 047UF 480 202 50V 04222 15 4732 8 9 214 283 0422 00 CAP FXD CER DI 0 047UF 480 202 5OV 04222 0015 4732 A9C217 283 0422 00 CAP FXD CER DI 0 047UF 480 202 bOV 04222 MD015E47 374B A09C220 283 0422 00 CAP DI 0 047UF 80 202 50V 04222 MD015E473ZAB A09C224 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 15 473 09 236 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E47 374B 9 243 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E47374B A09C248 283 0422 00 CAP FXD CER 01 0 047UF 80 20 50V 04222 15 473 A09C252 283 0422 00 CAP FXD CER DI 0 047UF 4 80 202 bOV 04222 5 4737 REV JAN 90 9 11 Replaceable Electrical Parts 1241 Addendum Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component Part Number Effect Discont Part Name amp Description Code Mfr Part Number 4090257 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB 9 267 283 0422 00 01 0 0470 80 20 50 04222 MD015E4737AB 9 330 283 0422 00 0I 0 047UF 80 20 50V 04222 MD015E4737AB 409033
145. 22 SAIOSELO4MAA 1210925 281 0775 00 CAP FXD CER D1 0 1UF 20 50V 04222 lt 5 105 1 4210950 281 0775 00 CAP FXD CER DI 0 1UF 201 50V 04222 SALOSE1O4MAA 4218100 315 0332 00 RES FXD FILM 3 3K 55 0 25 57668 3300 5 0 25w 218101 315 0202 00 RES FXD FILM 2K OHM 5 0 25W 57668 2000 5 0 25w 4218104 307 0488 00 RES NTWK FXD FI 5 100 OHM 20 0 75H 91637 MSPO6A01 1D1G OR CSC 718105 307 0488 00 RES NIWK FXD F1 5 100 OHM 20 0 75W 91637 MSPO6A01 1D1G OR CSC AZ1R115 307 0487 00 RES NIWK FXD FI 100 0 20 0 5 91637 5004801 101 9 38 REV JAN 90 AZ1R116 A2Z1U100 4220100 A22C105 A22C116 A22C120 22 125 22 130 2 140 2 150 22 915 22 916 22 920 A22C923 22 925 4220950 5228104 A22R105 A22R115 A22R116 A22R230 AC2R925 A220200 220230 A220830 A31 A31 A31C100 A31C101 A31C103 104 A31C105 A31C106 A31C108 1 109 1 111 1 116 A31C118 A31C120 A31C130 1 206 1 208 A31R100 A31U110 A31U116 A31U120 A31U126 A31U126 A31U220 A REV JAN 90 Component No Tektronix Part Number 307 0487 00 156 1338 02 670 8567 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0775 00 281 0 75 00 281 0775 00 281 0775 00 307 0488 00 307 0488 00 307 0487 00 307 0487 00 307 0492 00 307
146. 222 04222 04222 04222 91637 91637 91637 91637 91637 91637 04713 04713 04713 80009 80009 04222 04222 04222 04222 04222 04222 04222 04222 54473 04222 04222 04222 04222 04222 01121 04713 01295 04713 27014 Mfr Part Number CSCO4B01 1019 5534 670 8567 00 SA105E104MAA SA105E104MAA SA105E104MAA SA105E104MAA SA105E104MAA SATOSE104MAA SA105ET04MAA SA105E104MAA SA105E104MAA SA105E104MAA MSPO6A01 101G OR CSC MSPO6A01 1D1G OR CSC CSCO4B01 1019 CSCOABOI 101d CSCO4A01 500J 0R G CSCO4A01 500J 0R G 10H101 10H101 10H101 670 7696 00 670 7696 01 1 471 SA101A471KAA SA101A471KAA SALO5E104MAA SA101A471KAA SA101A471KAA SA105E104MAA SA101A471KAA ECE B16V100L SA105E104MAA SALO5E1LO4MAA 5 105 104 TVX1A470MAAZ SA101A471KAA SA105E104MAA 10K 52 0 125w 1489 SN74LS32N3 1488 160 1915 00 160 1915 01 825 B 670 7697 01 9 39 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number A32 670 7697 02 B021277 B021374 CIRCUIT BD ASSY GPIB 80009 670 7697 02 1200 02 OPTIONAL ACCESSORY A32 670 7697 03 B021375 CIRQUIT BD ASSY GPIB 80009 6 0 7697 03 1200 02 OPTIONAL ACCESSORY
147. 2345 Part Name amp Description Code Mfr Part Number B010100 8010770 010771 011191 011190 gt gt ok MJ Q Q d e 1 1 1 1 1 1 1 R gt 1 1 1 1 Replaceable Mechanical Parts 1241 Addendum KNOB IVORY GRAY SCROLL 1 243 ID X 1 4 OD X SETSCREW 5 40 X 0 125 STL FRAME PUSH BTN PANEL FRONT ATTACHING PARTS SCREW MACHINE 6 32 X 0 250 PNH STL SPACER POST 0 312 1 6 32 STUD BRS ALBALOY END ATTACHING PARTS WASHER FLAT 0 147 ID X 0 312 00 X 0 028 BRS PUSH BUTTON DOVE GRAY ARROW PUSH BUTTON DOVE GRAY NEXT PUSH BUTTON IVORY GRAY 0 4 SQ X 0 175 ENCODER DIGITAL INCREMENTAL 2 CHAN WASHER FLAT 0 266 ID X 0 437 00 X 0 03 STL PUSH BUTTON IVORY GRAY 1 PUSH BUTTON IVORY GRAY 2 PUSH BUTTON IVORY GRAY 3 PUSH BUTTON IVORY GRAY 4 PUSH BUTTON IVORY GRAY 5 PUSH BUTTON IVORY GRAY 6 PUSH BUTTON IVORY GRAY 7 PUSH BUTTON IVORY GRAY 8 PUSH BUTTON IVORY GRAY 9 PUSH BUTTON IVORY GRAY 0 PUSH BUTTON IVORY GRAY A PUSH BUTTON IVORY GRAY B PUSH BUTTON IVORY GRAY C PUSH BUTTON IVORY GRAY D PUSH BUTTON IVORY GRAY PUSH BUTTON IVORY GRAY F PUSH BUTTON IVORY GRAY X PUSH BUTTON IVORY GRAY DIAMOND PUSH BUTTON IVORY 0 450 X 0 175 PUSH BUTTON SLATE GRAY O 4 SQ X 0 24 H CIRCUIT BD ASSY KEYB
148. 241 Addendum 5 DISPLAY BOARD COUNTER TIMER ADJUST 18 em 432 TAS R420 Rura Wu vaas L 448 juas lt lt s uzes s 6270 East tia Figure 5 4 Expanded view of the Display Board shows components used in the Counter Timer Adjust uias 0175 E 5378 17 Equipment Required e test oscilloscope P6106 probe Adjustment Procedure 1 Power down the 1241 and remove the Display Board 2 Replace the Display Board on the appropriate extender board assembly A21 and power up the 1241 in NORMAL OPERATION mode 3 Press the front panel TRIGGER menu key and set the following parameters GLOBAL EVENT START TIMER DO NOTHING e SEQUENTIAL EVENT all steps deleted using the DELETE LEVEL soft key 4 Press the START key and set the oscilloscope timebase to 1 ns div 5 16 Verification and Adjustment Procedures 1241 Addendum Connect the CH1 oscilloscope probe to the Display Board at TP626 ground at TP628 refer to Figure 5 4 Connect the CH2 probe to the Display Board at TP425 ground at TP444 NOTE Because probe loading affects the measurement use only P6106 probes Check that the rising edge of the CH2 signal occurs 2 5 ns 0 5 ns before the signal transition on CH1 Record the measurement If the measurement is not out of tolerance continue to adjustment 6 for the CRT Drive Board If it i
149. 241 Addendum 8 4 Table 8 2 STATIC DAMAGE TABLE Semiconductor Class Danger Voltage MOS or CMOS 100 500 V ECL 200 500 V Schottky signal diodes 250 V Schottky TTL 500 V High frequency bipolar transistors 400 600 V JFETs 600 800 V Linear microcircuits 400 1000 V Low power Schottky TTL 1200 V voltage discharged from a 100 pF capacitor through 100 ohms resistance OPERATING THE 1241 WITH THE CABINET REMOVED DO NOT operate the instrument with the cabinet removed for extended periods of time unless it is raised off the working surface at least one half inch If itis necessary to run the 1241 for extended periods of time raise the instrument off the working surface in order to admit air to the power supply for cooling purposes Additionally another fan should be positioned to blow air onto the instrument bulkhead just below the card cage when the card cage is rolled into the service position This additional air supply should be aimed at the power supply heat sink located on the bottom of the bulkhead When operating the 1241 in the service position the rear panel fan does not provide adequate cool ing for some boards installed on the Extender board To avoid this problem a fan should be positioned to blow air across these extended boards The boards that require additional cooling are any 9 Channel Acquisition Boards any 18 Channel Acquisition Boards e the Trigger Board When operating the 1241 with the Power
150. 25V 18796 RPE113Z5U0105Z50V 1 216 290 0973 00 CAP FXD ELCTLT 100UF 20 25VDC 55680 UVXIVIOIMPA 13 220 290 0746 00 ELCTLT 47UF 50 202 16V TK0900 SM35VB47RM8X11LL 13 223 281 0772 00 DI 4700PF 10 100V 04222 201 47 13 224 283 0177 00 CAP FXD CER 80 20 25 187 RPE11325U0105Z50V 1 225 281 0775 00 DI 0 1UF 20 50V 04222 SA105E104MAA 13 226 283 0057 00 CAP FXD CER DI 0 1UF 80 20 200V 04222 SR302E105ZAA A13C227 283 0057 00 CAP FXD CER DI O 1UF 80 20 200V 04222 SR300E1057A4A 13 228 285 0627 00 PLASTIC O 0033UF 52 100V 19396 0490 74 28227 231 283 0177 00 CAP FXD CER DI 1UF 80 20 25V 18796 1132510105250 13 242 290 0804 00 CAP ELCTLT 1OUF 50 20 25V 55680 UVX1E100MWA 13 243 283 0177 00 DI 80 20 25 18796 113 500105 50 13 244 290 0950 00 CAP ELCTLT 100UF 50 20 SOWVDC 55680 ULBIHIOIMPA A13C247 290 0844 00 CAP ELCTLT 100UF 75 20 35WVDC 54473 ECE A35V100L 13 248 290 0942 00 CAP FXD ELCTLT 100UF 100 10 25V 55680 1 250 281 0775 00 01 0 10 20 50 04222 SA105E104MAA A13C253 290 0751 00 ELCTLT 2200UF 502 102 16V 56289 076245 13 266 281 0813 00 CAP FXD CER DI 0 047UF 202 5OV 04222 SA105E473MAA 13 270 290 0
151. 25w 330 5 0 25w 48283 036 48283 036 10108 10H105 10016 10016 10016 10016 10113 10016 10016 10H105 10108 LF412CN 51 5 0 125w LF412CN 51 5 0 1254 5018 1042 1042 1042 10422 10422 10422 10422 10422 10422 1042 MC14051BCLD MC14051BCLD MC14051BCLD 74C SN74LS161AN3 3431 3651 10H101 2112 1 2112 1 2112 1 2112 1 10H105 10H109 9 37 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number 160328 156 1733 00 IC DIGITAL ECL GATE QUAD OR NOR SCRN 04713 10101 160332 156 1794 00 IC DIGITAL ECL 4 WIDE 04713 10121 160335 156 1794 00 IC DIGITAL ECL GATE 4 WIDE 04713 100121 A16U338 156 1710 00 IC DIGITAL ECL GATE DUAL 2 WIDE 2 3 INPUT 04713 10117 160346 156 1674 00 IC DIGITAL ECL GATE QUAD 2 INPUT SCRN 04713 1010 A16U348 156 0541 02 IC DIGITAL LSTTL DEMUX DECODER DUAL 2 T0 4 01295 SN ALS139N3 160357 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74 374 160361 156 0975 02 IC DIGITAL LSTTL SHIFT REGISTER 8 BIT 01295 7415299 Al6u402 160 1917 00 MICROCKT MICROCELL ARRAY 01537 600 32205 00 A16U407 160 1917 00 MICROCKT DGTL MICROCELL GATE ARRAY 01537 600 32205 0 161412 160 1917 00 MICROCKT DGTL MICROCELL GATE ARRAY 01537 MCA600 32205 02 AL6U417 156 1640 01 IC D
152. 2UF 202 50V 18 96 RPE114 Z5U 205M50V 13 445 290 0916 00 CAP FXD ELCTLT 2200UF 50 202 35WVDC TKO900 SM35VB222MI8X35LL 13 4 285 1262 00 PLASTIC 0 015UF 5 400VDC 8411 264 015 5 400 13 460 290 0973 00 CAP ELCTLT 100UF 20 25 VDC 55680 UVXIVIOIMPA 13 465 283 0177 00 DI 1UF 480 201 25V 187 RPE113Z5U0105Z50V A13C467 283 0177 00 CAP FXD CER DI 1UF 80 202 25V 18796 RPE113Z5U0105250V A13C520 283 0105 00 CAP FXD CER DI 0 01UF 80 20 2000V 60705 564CBA202 2037 02 13 528 285 0893 00 FXD PLASTIC 10 200 04099 TEK13 7 A13C537 283 0624 00 CAP MICA DI 1300PF 2 500V 09023 CD19FD132G03 A13C543 290 0975 00 CAP FXD ELCTLT 33UF 20 100VDC 55680 TLB2A330MCA 13 544 290 0408 01 CAP FXD ELCTLT LOQUF 50 202 JOOWVDC 55680 ILB2A101MCA 1 545 283 0279 00 CAP FXD CER DI 0 001UF 202 3000V 18796 DHR12Y5S102M3KV 13 547 283 0279 00 CAP FXD CER 01 0 0010 20 3000 18796 DHR12Y5S102M3KV 13 548 290 0408 01 CAP FXD ELCTLT 100UF 50 20 100WVDC 55680 TLB2A1OIMCA REV JAN 90 9 19 Replaceable Electrical Parts 1241 Addendum Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number 13 554 290 0950 00 CAP FXD ELCTLT 100UF 50 20 SOWVDC 55680 ULBIHIOIMPA 13 555 281 0809 00 CAP FXD CER 01 200
153. 3 283 0423 00 DI 0 22UF 80 202 50V 04222 15 2242 09 336 283 0423 00 DI 0 22UF 80 20 50V 04222 15 2247 9 339 283 0423 00 CAP FXD CER 01 0 22 80 20 50 04222 5 224 4090343 283 0423 00 DI 0 22UF 80 20 50V 04222 0015 2247 4090351 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB A09C357 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04220 M0015E47374B A09C425 283 0422 00 CAP FXD DI 0 047UF 80 20 50V 04222 MD015E473ZAB 4090433 283 0423 00 CAP FXD CER DI 0 22UF 80 20 50V 04222 0015 2247 9 436 283 0423 00 CAP FXD CER DI 0 22UF 80 202 50V 04222 MD015E2247AA 4090439 283 0423 00 DI 0 22UF 80 20 50V 04222 MD015E 2247AA 9 443 283 0423 00 DI 0 22UF 80 20 50V 04222 MD015E2247AA 9 467 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E4737AB ADSCR138 152 0075 00 SEMICOND DVC DT SW GE 22V 80MW 00 7 66891 0856 0905321 150 1061 00 LT EMITTING DIO RED 660NM 50MA 50434 1301 20905322 150 1061 00 LT EMITTING DIO RED 660NM 50MA MAX 50434 1301 10905323 150 1061 00 LT EMITTING DIO 660 5 50434 1301 40905324 150 1061 00 LT EMITTING DIO RED 660NM 50MA 50434 1301 10905421 150 1061 00 LT EMITTING DIO RED 660NM 50MA MAX 50434 1301
154. 3 9 8MHZ CL 8949 SEE PARTS LIST FOR EARLIER ls E 3 74574 T M VALUES AND SERIAL NUMBER Q ale e 8 RANGES OF PARTS OUTLINED R R eska al 5 5125 DEPICTED IN GREY i i U40SB R R R UZIOB XAMCHy IA L30 74ASB32A 1 I3 74586 TAI 2 IA YD 5 1 1 za 3 OECO iB YI men mS men erm 2 ES Se a a ES CRONICE Me x u2Os U405D f NOA BUF CL iva be 22558 1 E n Tsee 74532 IWA T L B48 pie 3 8 s ccce Z 6 _ CSYNC CROM 629 14 2 2y LU E TAI2ZCH 10 2 LCP H 2B 2v2 PK DRAN H 5n LOECO Slog eval 5 UlOSB 74LS04 14 532 CL 4 HSEL L VSELCLYD ROCL _ QEA sv Q rsv NOTE Table 10 1 shows Static Sensitive Devices 1 0 PROCESSOR SELECT LOGIC 1 I O PROCESSOR R W CONTROL 1 VK I lt 1C Pinout VCC See Maintenance Section 1241 SERVICE P O DISPLAY S378 S6 REV FEB 999 RAW CONTROL SYNC GENERATION Table 10 8 COUNTER TIMER e DISPLAY BOARD ASSEMBLY A12 CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION C400 A2 A2 R530C ES C3 C405 F1 A3 R530D C3 C3 C423 E2 B3 R530E D3 C3 C526 E2 Back Bd R530G D1 C3 CR305 A2 A2 R600A F1 A3 CR476 B4 R600B 1 J508 F2 A3 R600C D4 A3 J508 E2
155. 32 8 33 Troubleshooting and Repair 1241 Addendum cL BZES 0 jausay 10SS9901g O I 91 8 asnBi4 pueog ejdsig uo paye007 WINOO 4 05 4 aul Suadana SS3uQQv 0 6 IVI S96 QVI Viva 0950 5031 H344 18 837708 JILSONSVIO 8 ZGN OGN 8 2 GNV SWOU SAM vel V uml Su344na roth SS3uaav osen Sven Oven 0940 91 Si vg ovg 0 29 15 WVHOVIG 40018 5390 0 1 9 55300 Ol 013538 1 8 0 8 082 H 1SHI 13S3u 32019 8 34 Troubleshooting and Repair 1241 Addendum uone2o pigog 20662044 O l L 8 aunbig ttt una SS Sal lh A Soe act e at Pale Saa RUE Eat i gie sun aa pepe puse Tubs en siin H ezin 8 95 ein is p asin 91n ezin sein sein ee qp o 9610 e ey ra f eee Ms 5 L L TN LEA d s ue
156. 35 SEMICOND DVC DT SW SI 30V 150MA 30V D0 35 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 SEMICOND DVC DT SCHOTTKY ST 15V 1 2PF D0 35 DELAY LINE ELEC 4NS 100 OFM COIL RF FIXED 2 2UH COIL RF FIXED 2 2UH TRANSISTOR NPN 51 0 106 TRANSISTOR PNP SI TO 92 TRANSISTOR PNP ST 10 92 TRANSISTOR PNP SI 0 92 TRANSISTOR PNP SI TO 92 TRANSISTOR PNP SI 10 92 TRANSISTOR PNP SI 10 92 TRANSISTOR PNP SI T0 92 TRANSISTOR PNP ST TO 92 TRANSISTOR PNP ST TO 92 P RES m 0HM 52 0 125 W RES NTWK FXD FI 202 1 0 D FI 0 1 04 FI 25W OW 0 125W RES NTWK FXD RES NTWK FXD 202 1 100 20 RES NIWK FXD FI 9 510 OHM 202 RES VAR 10K HM 0 5W RES VAR NONWW TRMR 500 0HM O 5W RES FXD FILM 1M OHM 5 0 25W RES FXD FILM 10K 0HM 52 0 25W RES FXD F1LM 4 99K 1 125W TC T9 RES FXD FILM 20K OHM 5 0 25W RES FXD FILM 442 0HM 12 0 1254 TC T2 RES FXD FILM 200K OHM 0 1 0 125W TC T2 RES FXD FILM 40K 0HM 0 12 0 1254 TC T9 RES NTWK FXD FI 20 1 0 RES FXD FILM 20 1254 1 19 5 20 1254 19 RES FXD FILM 1 RES FXD FILM 1 RES FXD FILM 3 RES FXD FILM 51 RES FXD FILM 51 RES FXD FILM 51 RES NTWK FXD FT 1 RES FXO FILM 100 RES FXO FILM 100 1 1 41 1 1 e J F 52 9 EEO 1 x 5855 eo e se oo
157. 353 00 SEMICOND DVC DI RECT SI 800V 1W 14099 014 AL3CRE60 152 0061 00 SEMICOND DVC DI SW SI 175V 0 1A 00 35 07263 FDH2161 AL3CR661 152 0574 00 SEMICOND DVC DI SW SI 120V 0 150MA 4NS D035 12969 NDP566 AL3F468 159 0059 00 FUSE WIRE LEAD 5A 125V 61857 SPI 5A 39187 131 1003 00 CONN RCPT ELEC CKT BD MT 3 PRONG 80009 131 1003 00 AL3J189 131 0608 00 TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL 22526 48283 036 AL3J200 131 0608 00 TERMINAL PIN 0 365 X 0 025 BRZ GOLD PL 22526 48283 036 AL3J265 131 2247 00 TERM FEEDTHRU 3 PIN INSULATED 27264 09 61 1031 13 288 131 1003 00 CONN RCPT ELEC CKT BD MT 3 PRONG 80009 131 1003 00 39464 131 2485 00 TERM SET PIN 2 PIN INSULATED 27264 09 60 1021 30475 131 1262 00 CONN RCPT 20 40 0 1 SP 05574 000201 4338 A13J548 131 2527 00 TERM SET PIN HEADER 1 X 7 0 156 CTR 27264 26 51 2073 139675 131 0608 00 TERMINAL 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 31 271 108 0245 00 CHOKE RF FIXED 3 9UH 10 0 35 DCR 76493 B6310 1 131351 108 0324 00 COIL RF FIXED 10MH 76493 B638 131 453 108 1165 01 COIL LINEARITY 60 OHM 02113 C 6391A A3L573 108 0245 00 CHOKE RF FIXED 3 9UH 10 0 35 DCR 76493 B6310 1 31662 108 0249 00 CHOKE FIXED 12MF 04072 B 4992 130100 151 1183 00 TRANSISTOR 05 60 0 6 1 6 OHM 81483 IRFD 9113 9 20 REV JAN 90 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Nu
158. 37 CMF55116G8ORO0F AL3R272 315 0220 00 RES FXD FILM 22 5 0 25 4 19701 22 5 0 25w 13 277 315 0241 00 RES FXD FILM 240 0HM 52 0 25W 19701 240 5 0 25w 38278 315 0100 00 RES FXD FILM 10 0HM 52 0 25W 19 01 10 5 0 25w AL3R280 315 0104 00 RES FILM 100K 0HM 52 0 25W 57668 100K 5 0 25w AL3R281 315 0105 00 RES FXD FILM 1M 0FM 52 0 25W 19701 5 0 254 AL3R282 315 0470 00 RES FXD FILM 47 OHM 5 0 25W 5 668 47 5 0 25w AL3R284 315 0161 00 RES FXD FILM 160 0HM 52 0 25W 19701 160 5 0 25w AL3R285 315 0105 00 RES FXD FILM 1M 0HM 52 0 25W 19701 1M 5 0 25w AL3R286 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w AL3R321 315 0391 00 RES FXD F1LM 390 OHM 5 0 25W 5 668 39 5 0 25w AL3R323 321 0204 00 RES FXD FILM 1 30K OHM 12 0 125W TC T0 91637 CMF55116613000F AL3R324 321 0388 00 RES FILM 107K OHM 12 0 125W TC T0 91637 1816610702 AL3R325 311 1232 00 RES VAR 50K 0HM O 5W 32997 3386F 1 503 AL3R326 315 0300 00 RES FXD FILM 30 0HM 52 0 25W 19701 30 5 0 25w A3R327 315 0300 00 RES FXD FILM 30 0HM 52 0 25W 19 01 30 5 0 25w AL3R331 315 0475 00 RES FXD FILM 4 7M 0HM 52 0 25W 01121 4 7M 52 0 25w AL3R332 321 0414 00 RES FXO FILM 200K OHM 12 0 125W TC TO 91637 CMF55116G20002F AL3R334 315 0513 00 RES FXD FILM 51K OHM 5 0 25W 5 668 51K 5 0 25w AL3R337 315 0100 00 RES FXD FILM 10 OHM 52 0 25W 19701 10 5 0 25w AL3R340 315 0510 00 RES FXD FILM 51 0HM 52 0 25W 19701 51 52 0 25w
159. 380 11F1 LED Error Index 11FF LED Error index Explanation This test checks both RAMs A10U150 and U145 for independence of all address and data lines as well as the ability to set and clear each bit within the RAMs The appropriate LED er ror index indicates the failed RAM LED A10DS534 flashes for a failure RAM A10U150 however both A10DS534 and DS532 flash for a failure in RAM A10U145 First all locations in both RAMs are filled with AAnex then the first location is checked for that AAnex value If the value is present it is replaced with and successive locations are checked and changed until the end of memory When the RAMs are filled with the CC value the check and re place process is repeated using as the replacement value Finally the value OF is used in the check and replacement process When the check and replace process is complete each RAM memory location is again checked for the FOnex value Probable Cause Action Error index 11 1 Bad RAM A10U150 Suspect RAM A10U150 Error Index 11FF Bad RAM A10U145 Suspect RAM A10U145 8 41 Troubleshooting and Repair 1241 Addendum 8 z 10 9204d O I 61 8 aunbi4 8 553 00 u344ng pieog eidsig uo p le5o1 vd H 1SHI 13538 09501 WINOO 2605 1 0 SQ31 ONY u3zzng viva 2
160. 3917 SEMICOND DVC DI SW GE 22V 80MW DO 7 66891 G866 AMCR330 152 0075 00 B013918 SEMICOND ONC DI SW GE 22V B0M4 DO 7 66891 G866 4410110 151 0188 00 8013918 TRANSISTOR PNP SI TO 92 04713 2N396 10204 151 0190 00 8010100 8013917 TRANSISTOR NPN SI TO 92 04713 2N3904 410206 151 0188 00 8 010100 B013917 TRANSISTOR PNP SI 10 92 04713 203906 A410210 151 0190 00 013918 TRANSISTOR NPN SI TO 92 04713 2839 M1R100 307 0446 00 10100 013917 RES NTWK FXD FI 10K OHM 20 9 RES 91637 MSP10A01 103M OR G M1R102 315 0103 00 10100 013917 RES FXD FILM 10K OHM 5 0 25W 19701 10K 5 0 25w AA1R106 307 0542 00 8010100 B013917 RES NTWK FXD FT 5 10K 0HM 52 0 125W 91637 CSCO6A01 103J OR G M1R113 315 0102 00 010100 013917 RES FXD FILM 1K OHM 5 0 25W 57668 1000 5 0 25w 1 116 315 0201 00 010100 013917 RES FXD FILM 200 OHM 5 0 25W 57668 200 5 0 25w A41R121 315 0511 00 8013918 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w AA1R122 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 5 668 1000 5 0 25w AM1R123 315 0103 00 B013918 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 52 0 25w MIRI 24 315 0102 00 8010100 B013917 RES FXD FILM 1K OHM 5 0 25W 57668 1000 5 0 25w 9 40 REV JAN 90 AA1R126 AA1R130 ARI AAIRI33 M1R134 1 200 AA1R202 213 A1R215 AA1R216 AAIR231 MIR232 AA1R233 AA1R330 5810110 AA1U120 A41U120 410210 4410210 10220 A1U310 AAIVR104 AA1VR110 M M2C100 2 200 111 F201 F20
161. 4 00 1 FRAME PNL CAB REAR 80009 426 1914 00 ATTACHING PARTS 13 211 0504 00 4 SCREW 6 22 X 0 250 PNH STL TK0435 ORDER BY DESCRIPTION 14 211 0510 00 2 SCREW MACHINE 6 32 X 0 375 PNH STL TK0435 ORDER BY DESCRIPTION END ATTACHING PARTS 15 200 2815 00 1 DOOR ROM PACK POLYCARBONATE 80009 200 2815 00 16 214 1906 00 1 SPR HLCL TRSN 0 108 OD X 1 25 MUSIC WIRE TK0508 ORDER BY DESCRIPTION 1 334 4757 00 1 MARKER IDENT MKD COMMUNICATION PACK 80009 334 4757 00 18 129 1006 00 4 SPACER POST 0 95 L 6 32 EXT INT BRS ZN PL 06540 9743 61 0632 19 437 0295 00 1 L GC ANALY 80009 437 0295 00 11 4 REV JAN 1990 1241 Service REV OCT 1986 REV JAN 1990 1241 Service Fig amp Index pos N 512 14 515 16 19 20 22 23 24 25 26 27 28 29 30 521 32 33 34 35 36 Tektronix 366 2159 00 213 0153 00 426 0785 00 333 2924 00 211 0504 00 129 0208 00 366 2032 02 SIN S S S s S RERRRRRR RS NHESSZIRSRE SRR RRR RRR c3 c9 c9 c3 nN e BRERRRRR SSSSRBUSEES e ew m m 131 2221 00 337 3072 00 331 0486 00 119 2027 00 119 2027 01 119 2027 00 214 3103 00 252 0571 00 210 0586 00 366 1381 01 384 1136 00 260 1849 02 REV JAN 1990 Serial Number No Part Number Effect Discont Qty 1
162. 4002 Selectable from 6 35 to 6 35 V in 50 mV increments also includes preset values for TTL 41 4 TPG 4 370 V ECL 1 30 V 25 of TH 4 8mV measured at probe connector with offset sense connected to GND sense and 10 5K 0 196 between J620 16 and 13 Characteristic MEMORY CONFIGURATION Width Depth no chaining 2 1240D2s chained 3 1240025 chained 4 1240D2s chained TIMEBASE GENERATION Clock input pulse width period amplitude Qualifier input setup time hold time SYNCHRONOUS OPERATION Data all channels Setup time Hold time Amplitude SYNC events global event for all channels sequential event for all channels ASYNCHRONOUS OPERATION Data min word width guaranteed to be sampled Table 2 3 Specifications 1241 Addendum 1240D2 ELECTRICAL SPECIFICATIONS Performance Requirements s RERO T OC CENE S A 8 ns min 20 ns min 350 mV min above and below programmed threshold 11 ns max 0 ns max t 350 mV min above and below programmed threshold Timebase period 6 ns Supplemental information 18 stored data channels 2 non stored clock qualifier channels 513 1025 1537 2049 Min time between OR d clocks is 25 ns Values based on 124002 with P6460 sition probes Single selected qualifier driven Uses signals specified by the operator in the Timebase menu Can be used with
163. 4222 15 4732 Al2CA60 283 0422 00 D1 0 047UF 80 202 50V 04222 MD015E473ZAB Al2C465 283 0422 00 DI 0 047UF 480 202 50V 04222 MD015E4737AB Al2C470 283 0422 00 DI 0 047UF 80 202 50V 04222 015 4737 12 75 283 0422 00 CAP FXD CER DI 0 047UF 480 208 50 04222 15 473 12 480 283 0637 00 CAP FXD MICA DI 20PF 2 52 500V 09023 015 0200003 12 490 281 0813 00 01 0 0470 20 50 04222 SA105E473MAA AL2CA98 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SA105E473MAA 12 508 283 0422 00 amp DI 0 047UF 80 202 50V 04222 0015 4737 REV JAN 90 9 15 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component Number Effect Discont Part Name amp Description Mfr Part Number 12 526 283 0775 00 01 1764 PF 12 500V 09023 CD19FD 1764 FOB 12 596 281 0775 00 CAP FXD CER DI 0 1UF 202 50V 04222 SA105E104MAA 12 597 281 0813 00 01 0 0470 20 50V 04222 SA105E473MAA AL2C598 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SA105E473MAA AL2C608 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E473ZAB Al2C610 283 0422 00 DI 0 047UF 480 202 50V 04222 MD015E4737AB Al2C615 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E4737AB
164. 471 USSOA IOHIOS cose lo As COe H Y e5 e 5 A39 1O0mS L ESE up OSE pepa ES 53 58 ER TIMER CONTROL PROCESSOR INTERFACE U 4 9 8 D U 49 8 R485 EGOS TS 22 MC3431 US9SA MC3431 R486 180 s 7 cL STK STE 7415155 gt gt RIO ECL STK T 597 R490 820 CT READ 4 CT READ 2 H 047 CT STB H STK STBCO CwR L Static Sensitive Devices See Maintenance Section NOTE Table 10 1 shows IC Pinout VCC amp Gnd 1241 SERVICE 5376 58 ASYNCHRONOUS TIMEBASE 52 REPLACEABLE af af MECHANICAL SECTION PARTS Section 11 1241 Addendum REPLACEABLE MECHANICAL PARTS PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements developed in our engineering department is therefore important when ordering parts to inciude the following information in your order Part number instrument type or number serial number
165. 4713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 14301 10H121 10H104 10H131 SN 4LS138N3 10H102 10H105 10H131 10H117 10H131 10016 10H131 10H105 10H102 10H131 10H10 10H102 10H101 10H104 10H131 109016 58741513883 10H131 10H174 10H131 10H109 10H104 109107 10H145 10H103 10H131 10H117 10H131 10 121 10H131 10H121 109131 10131 10H105 1010 10186 10195 10H121 10H121 10H121 10H121 10H131 10H105 10H131 10H107 10H102 10H121 10 11 10 131 10H131 109107 011 008 0240 670 7524 09 Replaceable Electrical Parts 1241 Addendum Tektronix Seria Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number A15C100 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB 5 115 283 0422 00 CAP FXD CER D1 0 047UF 80 20 50V 04222 MD015E4737 B Al5C125 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E4737AB 15 135 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MDO15E473ZAB 15 152 283 0422 00 01 0 047 80 20 50V 04222 MD015E4737AB AL5C155 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB 15 160 283 0422 00 DI 0 047UF 80 202 50V 04222 15 4737 15 170 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E
166. 473ZAB 15 198 281 0792 00 CAP FXD CER 01 82 105 100 04222 5 102 2 15 190 281 0773 00 DI 0 01UF 10 100V 04222 5 201 103 A15C192 281 0809 00 CAP FXD CER 01 200 PF 5 100V 04222 101 201 15 262 281 0814 00 DI 100 10 100 04222 101 101 AL5C270 283 0422 00 DI 0 047UF 80 20 50V 04222 15 4732 15 275 283 0422 00 DI 0 047UF 80 202 50V 04222 MD015E473ZAB 15 280 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 5 105 104 15 281 290 0 78 00 ELCTLT 1UF 202 50V 20 TKO900 SM BP D 50VB1RO 5 Al 5 282 290 0778 00 ELCTLT 1UF 202 50V 20 TKO900 SM BP D 50VB1RO M 5 AL5C285 283 0422 00 CAP FXD CER 01 0 0470 480 202 50V 04222 MD015E4737AB AL5C290 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50 04222 MD015F4737AB AL5C294 283 0204 00 DI 0 01UF 202 50V 18 96 RPE11075J103M50V AL5C295 281 0813 00 CAP FXD CER DI 0 047UF 202 50V 04222 SALOSE473MAA AL5C310 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E47374B A15C315 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E4737AB AL5C320 283 0422 00 CAP FXD CER DI 0 047UF 480 202 50V 04222 MD015E47374B A15C330 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB A15C335 283 0422 00 CAP FXD CER DI 0 047UF
167. 5 0274 00 315 0104 00 315 0392 00 315 0430 00 315 0471 00 315 0560 00 315 0153 00 315 0334 00 315 0103 00 303 0101 00 308 0406 00 120 1652 00 119 2066 00 119 2066 01 120 1653 00 131 0608 00 131 0608 00 131 0608 00 214 0579 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 156 2458 00 10100 010127 010128 RES FXD CMPSN 24K OHM 52 1W RES FXD WW 1 OHM 5 2W RES FILM 100K OHM 12 0 125W TC TO RES FXD FILM 4 7K 0HM 52 0 25W RES FXD FILM 191K OHM 1 0 125W TC TO RES FXD FILM 50K 0HM 12 0 125W TC TO RES FXD FILM 9 1K 0HM 52 0 25W RES FXD FILM 4 7K OHM 5 0 25W RES FXD FILM 10 0K 0HM 12 0 125W TC TO RES 5 1 OHM 5 0125W RES FXD CMPSN 200 0HM 54 1W RES FXD FILM 133 0HM 12 0 1254 TC TO RES FXD FILM 1 15K OHM 12 0 125W TC TO RES FXD FILM 470K 0HM 52 0 25W RES VAR WW TRIMMER 2 5 MEGOHMS 0 5W RES FXD FILM 470K 52 1W RES FXD FILM 470K 52 1M RES FXD FILM 6 8K 0HM 52 0 25W RES FXD FILM 10 5 0 25 FILM 270K OHM 52 0 25W RES FXD FILM 100K OHM 52 0 25W RES FXD FILM 3 9K OHM 52 0 25W RES FXD FILM 43 OHM 5 0 25W RES FXD F1LM 470 0HM 52 0 25W RES FXD FILM 56 OHM 5 0 25W RES F
168. 5 F1 D3 U275A B3 C470 F3 ES U310A C2 C475 F3 U405A B4 C490 F3 F3 U405F E3 C498 F2 U415B E3 C508 A3 U425 E3 C598 F3 F3 U430 B5 SEE PARTS LIST FOR SERIAL NUMBER RANGES BOARD LOCATION lt Y H Y 7 H Oo O o O O o Oo O 85 CH T i CH 74 EXPM H z gt 7445157 15 RCH R3 H 2 lt gt LOCH L2 R2 H 5 RICH HOCH B NACH lt 9 8M 2 4M H GT BLNK CB H z gt 0405 74 COMPONENT NUMBER EXAMPLE Component Number 23 2 R1234 Schematic Assembly _ Circuit Number Subassembly Number Number if used Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List lt CH CB L VORIVE GREEN H UZM H i241 SERVICE B C D E F u l SSG 2 2 a a w 5 pad CHARACTER GENERATION ane 2 RE SV VIDEO OUT CR ARI 5V 5V C415 BS U230 0235 In Si r 0240 PAL i LBA PAL Ie LSA T 047 Geis 2 74 5273 2 2 COZI aaa A40 29 seco sv fee Q 2d 44 S 9 C450 SNO JAG case C465 Q 911 4 ees Q C625 ese TP225 TP 290 PASO e Tess
169. 51 40 1 10 226 237 04713 2 6727 4070461 151 0621 00 TRANSISTOR NPN 51 T 220 04 13 970471 151 0464 00 TRANSISTOR NPN 51 TO 220 04 13 29 4070472 151 0301 00 TRANSISTOR PNP SI TO 18 04 13 2N2907A 70485 151 0273 00 TRANSISTOR SELECTED 04713 2N5249 070487 151 0496 00 TRANSISTOR NPN SI 03508 DOK A07R121 315 0106 00 RES FXD FILM 10M OHM 5 0 25W 01121 10M 52 0 25w A07R172 315 0103 00 RES FXD FILM 10K OHM 5 0 25W 19701 10 5 0 25w 73 315 0101 00 RES FXD FILM 100 52 0 25 57668 100 5 0 25w A07R174 315 0223 00 RES FXD FILM 22K OHM 5 0 25W 19701 22K 5 0 25w 07R175 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 5 668 100 52 0 25w A RI amp 315 0100 00 RES FXD FILM 10 OHM 5 0 25W 19701 10 5 0 25w 7 84 315 0103 00 RES FILM 10K OHM 5 0 25W 19701 10K 5 0 25w 86 315 0242 00 RES FXD FILM 2 4K 0HM 52 0 25W 5 668 2400 5 0 25w A07R221 302 0224 00 RES FXD CMPSN 220K 102 0 5 MI 01121 220K 10 0 5w A07 R222 302 0224 00 RES FXD CMPSN 220K 0HM 102 0 5W MI 01121 220K 10 0 5w A07R23A 315 0103 00 RES FXD FILM 10K 52 0 25W 19 01 10K 5 0 25w 407 R245 308 0161 00 RES FXD WW 3 0HM 54 84 91637 HL 12 027 8 07R261 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 5 668 1000 5 0 25w 1078263 315 0102 00 RES FXD FILM 1K 0HM 52 0 25M 57668 1000 5 0 25w A07R264 321 0193 00 RES FXD FILM 1K 12 0 1254 1 0 91637 CMF55116G10000F 07 R265 321 0193 00 R
170. 5163 15 7415166 7415175 7418244 74ALS273 LS 74279 74LS283 74C374 LS 74LS390 74LS393 74LS670 74AS832A 7555 7812 78L15 79M12 LM324 MC1436U MC3431 MC393N MC7905 PAL16L8A TDA1170S TL702 TSC426 MJA UG3526N Vcc or a L L l4 L 4 gt pe eu a IO QUE SUR E O gt O gt 02000000000 16 GND OO OO CO OO CO CO OO NO O0 O 341 N NI N 4 0M M MJ c o Co N CO EN Y Oot E gt gt 635 CR 2 tR 2a d m R L 2 R6 S2 pee 3 661 659 ose C625 x R578 R571 TPP CRE6B x d T I TA 4556 C554 0 6576 cs73 csee 0565 SA 1573 566 5557 RSSA 565 8563 R556 R553 RSS opseg R555 04552 565 8554 T524 4548 T512 C548 C544 C545 W512 1 CR528 ERSZ t i c528 C569 Benet RN E C848 E 4 85355 _ me i owe 5408 RS31 VR 36 LE L453 NE i QUE E o TEM p 7 4 RA22 9475 9478 C447 ica puc ue j _ HUM iere C445 dem i d 33 T366 RIAS TP344 R337 d R337 U347 R342 RIA T CRJ34 R353 TP37
171. 52 0689 00 SEMICOND DVC DI ZEN SI 3 9 V 5 2 0 44 D0 35 04713 1N 48ARL REV JAN 90 9 13 Replaceable Electrical Parts 1241 Addendum 9 14 Tektronix Serial Number Mtr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number 217 152 0689 00 SEMICOND 01 7 51 3 9 V 5 2 0 44 D0 35 04713 IN 48ARL A 9Y225 158 0244 00 XTAL UNIT QTZ 24MHZ 0 019 SERIES RESONANT 33096 CCAT101405 ADSY250 158 0135 00 XTAL UNIT QTZ 14 7456 MHZ 0 01 SERIES 01807 ORDER BY DESCRIPTION 0 670 7526 15 010100 10323 circuit bd 5 1 0 PROCESSOR 80009 670 7526 15 AlO 670 7526 16 10324 CIRCUIT BD ASSY 1I 0 PROCESSOR 80009 670 7526 16 ALOC211 285 0862 00 CAP FXD PLASTIC 0 001 102 100V 19396 0U490 74 28219 10 323 281 0819 00 CAP FXD CER 01 33 55 50 04222 SA102A330JAA ALOCR220 152 0075 00 SEMICOND DVC DI SW GE 22V 80 00 7 66891 866 ALOR110 315 0301 00 RES FXD FILM 300 OHM 52 0 25W 57668 300 5 0 25w 4108220 315 0562 00 RES FXO FILM 5 6K OHM 5 0 25W 57668 5600 5 0 25w 108222 315 0103 00 RES FXD FILM 10K OHM 53 0 254 19701 10K 5 0 25w ALOR223 315 0303 00 RES FXD FILM 30K 0HM 52 0 254 19701 5 0 25w 4108226 315 0103 00 RES FXD FILM 10K 0HM 51 0 254 19701 5 0 25w ALOR255 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 57668 1000 52 0 25w AlOR275 315 0103 00 RES FXD FILM 10K OHM 5 0 25W 19701 10K 5 0 25w ALORZ84 315 0103 00 RES FILM 10K 0HM 52 0 25W 19
172. 5378 63 Figure 8 1 1241 power supply troubleshooting tree Troubleshooting and Repair 1241 Addendum IS REAR PANEL FUSE NO YES DID INSTRUMENT HEAT ABOVE 100 C YES NO IS LAMP A07DS121 NO FLASHING YES NO IS THE KICKSTART 25V O K YES iS NO U375 PIN17 at 20V YES iS 0375 PINS NO AT LOGIC HIGH YES CHECK U375 AND ASSOC CKT CHANGE ACCORDING TO THE REPLACEABLE PARTS LIST REPLACE THERMAL FUSE ON INTERFACE BD CHECK Q421 Q422 AND ASSOC CKT F201 BRIDGE CR211 5100 RV221 RV224 RV401 CHECK 0283 0284 0472 0485 55 0284 0472 0371 9375 AND ASSOC CHECK Q273 U375 AND SHUTDOWN L FROM INTERFACE A08 Figure 8 1 1241 power supply troubleshooting tree cont IS THE KICKSTART 25V CHECK Q284 AND ASSOC CKT U375 PIN 7 CKT NO YES YES NO YES NO iS NO U375 PIN4 AT LOGIC HIGH CHECK C379 AND U375 Troubleshooting and Repair 1241 Addendum CHECK Q283 Q284 C465 VR481 CR151 CR152 CR153 CR154 CHECK U375 PIN18 FOR 5V ASSOC CKT CHECK R377 R383 AND ASSOC CKT J110 J120 J130 CHECK U375 PIN7 CURRENT LIMIT INPUT IS U375 PIN7 INPUT O K NO ASSOC D WITH 0375 PIN7 YES CHECK
173. 578 E3 Al R181 C2 A4 CR183 A2 A4 R183 B2 A4 CR266 B3 B3 R185 C2 A4 CR273 B4 B3 R186 C2 A4 CR282 B2 A4 R187 B2 A4 CR283 4 R266 B3 B4 CR284 A4 A3 R267 B4 B3 J187 A2 A4 R268 B4 B3 J189 A2 A4 R272 C4 B4 J288 A4 R277 C4 A3 J470 D1 B2 R278 B3 A3 J470 C3 B2 R280 B2 A4 J475 1 A2 R281 A3 A4 L271 B2 B4 R282 A4 A3 L573 E4 B1 R284 C3 A3 P189 harmonica R285 A2 A4 0175 C2 A4 R286 A2 A4 Q176 C3 A4 178 B3 A4 Q177 C2 A4 TP270 C3 B4 Q178 B3 A4 W121 C3 Off Bd Q188 B2 A4 W121 D1 Off Bd Q267 B4 B3 W187 2 0273 4 B3 W189 A2 Off Bd Q275A B3 4 W288 A4 Off a 5V 25175 P O 2 2 gt P O P O QI75 W 89 pias s e 557 6 4 CH 5V 2 lt 0188 R2RC IOK CRI amp 3 p 5K 332 C270 271 b SV 53 Riss 5V W 1 87 J187 RISI ee TRIGGER INCH Q275B ERO QUT V P O REAR K J470 RIBS ANEL 150 TRIG IN H B lt 9178 v Y VID GND AI B2 aids ___ AS TRIG IN LEVEL OFFSET aa SHIFT AND BUFFER lev es ee TRIG OUT LEVEL PM 5V E SHIFT AND BUFFER 1 CAS R266 i IBO 45V 525 ESN 84 5 0 047 222207 doin Q273 lt N TRIG OUT H 5 RZOB R277 amp o 240 tSv 9 267 4 R267 CR273 weee 72558 au TO TRIGGER cR2B H REAR OUT CH PANEL 1 R282 R272 47 75 2 83 N 22 3
174. 6 VOLTS ON F468 CHECK THAT Q455 AND U465 ARE NOT SHORTED TO HEAT SINK 15 16 VOLTS ON F468 NO REPLACE 0455 AND RECHECK F468 FOR 16 VOLTS Troubleshooting and Repair 1241 Addendum TROUBLESHOOT HORIZONTAL SWEEP CIRCUIT NOTE LIFTING THIS ANODE DISABLES THE HIGH VOLTAGE CIRCUITRY 7 YES YES Figure 8 2 1241 CRT Drive Board troubleshooting tree cont 8 13 Troubleshooting and Repair 1241 Addendum YES IS THERE 12 VOLTS ON U336 PIN 6 NO NO SUSPECT U336 COMPARE U218 PINS 3 4 AND 7 WITH FIGS 8 7 amp 8 8 SUSPECT 1218 U238 Q237 TROUBLESHOOT HORIZONTAL SWEEP CIRCUIT CONT 15 12 VOLTS ON CR466 ANODE REMOVE 0455 CHECK WITH OHMMETER iS THERE 12 VOLTS ON ANODE OF CR466 SUSPECT U465 OR SHORT ON NO 12 VOLT LINE YES DOES WAVEFORM AT TP340 MATCH FIG 8 4 YES RE INSTALL Q455 DOES WAVEFORM AT TP456 MATCH FIG 8 3 YES REPLACE ANODE OF CR337 NO CHECK HORIZONTAL SWEEP CIRCUIT CONTINUITY SUSPECT L453 R452 C560 CRT YOKE Figure 8 2 1241 CRT Drive Board troubleshooting tree cont 8 14 Troubleshooting and Repair 1241 Addendum 5 TROUBLESHOOT VERTICAL SWEEP CIRCUIT IS CHECK F468 ES DN box CHECK IF BLOWN 4 POWER U241 PIN 2 SUSP
175. 637 22526 22526 22526 22526 22526 22526 22526 22526 Mfr Part Number 680 5 0 254 100 5 0 25w 560 5 0 125w 2700 5 0 125w CSCOBA01 680 OR MSPO 5 1 680 OR MSPO 68 5 0 25w 100 5 0 125w 68 5 0 25w 68 5 0 25w CSCOBAO1 680 OR MSPO 100 52 0 125w 33291 C48 201 220 5 0 125w 100 52 0 125w CSCOBA01 680 OR MSPO 5 1 680 OR MSPO 5 1 680 OR MSPO CSCOBAO1 680 OR MSPO 510 52 0 25w 3386F T04 201 1000 5 0 25w 330 5 0 25w 47 5 0 25w 68 5 0 25w CSCOBAO1 680 OR MSPO CSC10A03680G OR MSP1 150 5 0 25w CSC10A03680G OR CSCOBAO1 221G OR MSP 220 5 0 25 220 5 0 25w CSCOBA01 680 OR MSPO CSC10A403680G OR MSP CSC10A03680G OR MSP1 CSCOBA01 680 OR MSPO CSCOBA01 680 OR MSPO 68 5 0 125w 68 5 0 25w 5 08 01 680 OR MSPO 68 5 0 25w 1000 5 0 25w 100 52 0 125w MDP 16 45 CSCOBAO1 680 OR MSPO CSCOBAO1 680 OR MSPO 180 5 0 25w 100 5 0 25w 200 5 0 25w 68 5 0 125w CSCOBAO1 680 OR MSPO 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 9 27 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number Al4TP358 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 AL4TP516 131 0608 00 TERMINAL PIN 0 365 X 0 025 BRZ GOLD PL 22526 48283 036 4 520 131 0608 00 TERMIN
176. 67 156 0422 02 IC DIGITAL LSTIL COUNTER SYNCH 4 BIT 01295 SN74LS191N3 A09U329 156 1697 00 IC PROCESSOR STTL CONTROLLER 64K DRAM 34649 8203 3 A090 333 156 1626 00 MICROCKT DGTL NMOS 65536 X 1 DRAM TK2209 4864 4090336 156 1626 00 MICROCKT DGTL NMOS 65536 X 1 DRAM 2209 4864 409339 156 1626 00 MICROCKT DGTL NMOS 65536 X 1 DRAM 2209 4864 409343 156 1626 00 MICROCKT DGTL NMOS 65536 X 1 DRAM 2209 4864 409347 156 1609 00 IC PROCESSOR HMOS MICROPROCESSOR 8 BIT 34649 8088 1091351 156 1065 01 IC 2 LSTTL LATCH OCTAL 0 01295 7415373 409354 156 1318 00 IC DIGITAL LSTTL LATOH 4 BIT BISTABLE 01295 7415375 A09U357 156 0541 02 IC DIGITAL LSTTL DEMUX DECODER DUAL 2 TO 4 01295 SN74LS139N3 A09U361 156 0459 02 IC DIGITAL STTL GATES QUAD 2 INPUT AND 01295 7458 A09J367 156 1273 01 IC DIGITAL LSTTL COMPARATOR 8 BIT EQUAL TO 34335 25152521 A090433 156 1626 00 MICROCKT DGTL NMOS 65536 X 1 DRAM TK2209 4864 9436 156 1626 00 MICROCKT OGTL 65536 X 1 DRAM TK2209 4864 4094439 156 1626 00 DGTL NMOS 65536 X 1 DRAM 2209 4864 090443 156 1626 00 MICROCKT DGTL NMOS 65536 X 1 DRAM 2209 4864 A09U451 156 1065 01 IC DIGITAL LSTTL LATCH OCTAL D TYPE 01295 7415373 A09U454 156 0956 02 IC DIGITAL LSTTL BUFFER NONINV OCTAL LINE 01295 SN74LS244N3 409U457 156 1111 02 IC DIGITAL LSTTL BUS TRANSCEIVER OCTAL 01295 SN ALS245N3 A09J467 156 1273 01 IC DIGITAL LSTTL COMPARATOR 8 BIT EQUAL TO 34335 2552521 AXNR142 1
177. 6U215 16 219 160224 16 028 16 232 A16U236 Al6U240 160246 160248 16 253 160257 A16U261 160266 A16U303 A16J307 A16U310 A16U313 A160317 A16U320 A160324 REV JAN 90 Tektronix 317 0331 00 315 0511 00 315 0510 00 315 0510 00 315 0680 00 307 0587 00 315 0680 00 307 0587 00 307 0587 00 307 0587 00 307 0587 00 315 0101 00 307 0587 00 315 0101 00 307 0897 00 315 0512 00 315 0512 00 315 0331 00 131 0608 00 131 0608 00 156 0759 02 156 1642 01 156 1038 01 156 1038 01 156 1038 01 156 1038 01 156 0687 01 156 1038 01 156 1038 01 156 1642 01 156 0759 02 156 1699 00 317 0510 00 156 1699 00 317 0510 00 156 1311 01 156 2172 00 156 2172 00 156 2172 00 156 2172 00 156 2172 00 156 2172 00 156 2172 00 156 2172 00 156 2172 00 156 2172 00 156 0513 02 156 0513 02 156 0513 02 156 0766 02 156 0644 02 156 1647 00 156 1733 00 156 1685 00 156 1685 00 156 1685 00 156 1685 00 156 1642 01 156 1682 00 Part Number Replaceable Electrical Parts 1241 Addendum Serial Number Effect Discont Part Name amp Description RES FXD CMPSN 330 0HM 52 0 125W RES FXD FILM 510 OHM 52 0 25W RES FXD FILM 51 54 0 25 RES FXD FILM 51 OHM 5 0 25W RES FXD FILM 68 OHM 52 0 25W RES NTWK FXD FI1 7 68 OHM 20 0 125W RES FXD FILM 68 0HM 52 0 25W RES 7768 202 0 125 RES NTWK FXD F1 7 68 0HM 202 0 1254
178. 7 670 7523 10 670 7523 11 MD015E4737AB MD015E473ZAB MD015E4737AB 15 4737 SA101A201 JAA 015 473 MD015E473ZAB MD015E473ZAB MD015E4737AB MD015E4737AB MD015E473ZAB MD015E473ZAB MD015E4737AB UVX1HOLOMAA MD015E473ZAB MD015 473ZAB SA102C331MAA MD015E473ZAB MD015E47374B SA101A220KAA SA102A101JAA SA101A100KAA SA101A220KAA MD015E4737AB SA101A220KAA MDO15E4737AB 1N962B 1N962B 1N962B 5 5 5 REV JAN 90 14 533 14 535 14 550 14 560 14 610 14 612 14 618 14 638 14 650 14 652 14 660 14 665 14 675 AL4CR165 ALACR295 A14CR340 A14CR585 AL40L355 1401 355 A14DL356 1401356 Al4DL366 1401368 1401 456 1401 480 1401 510 1401 575 Al4J148 Al4J246 140255 14 310 Al4J365 4149372 Al4J375 Al4J385 14 452 A14J460 Al4J510 Al4J514 149550 Al4J615 149620 149630 4633 14 148 14 246 14 255 14 65 14 372 14 375 14 452 14 460 14 510 14 514 Al4P550 14 615 4 110 Al4R133 Al4R136 REV JAN 90 Component No 380 119 1380 380 Tektronix Part Number 281 0819 00 283 0422 00 281 0765 00 283 0422 00 283 0422 00 281 0759 00 283 0422 00 283 0422 00 281 0811 00 281 0763 00 283 0422 00 283 0422 00 281 0759 00 152 0141 02 152 0141 02 152 0141 02 152 0141 02 119 10
179. 7 4 01295 SN74S74NP3 REV JAN 90 9 17 Serial Number Replaceable Electrical Parts 1241 Addendum Mfr Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number AL2U450 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 AL2U455 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 Al2U460 156 1038 01 IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 07263 10016 Al2U465 156 1667 00 IC DIGITAL ECL MUX 8 TO 1 SCRN 10H164 04713 10H164 Al2U470 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 AL2U475 156 1674 00 IC DIGITAL ECL GATE QUAD 2 INPUT AND SCRN 04713 10H104 156 0508 02 IC DIGITAL TTL LATCH QUAD S R LATCH 74279 01295 74279 A120485 156 1198 01 IC DIGITAL STTL COUNTER SYNCH 4 BIT BINARY 01295 SN74S163N3 156 0323 02 IC DIGITAL STTL GATEsHEX INV 74S04 DIP14 3 01295 7450 2498 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 AL2U500 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 Al2U505 156 0543 01 IC DIGITAL ECL BUFFER DRIVER HEX WITH 04713 10188 A120510 156 1674 00 IC DIGITAL ECL GATE QUAD 2 INPUT AND SCRN 04713 10H104 A120515 156 2019 00 IC DIGITAL ECL GATE QUAD 2 INPUT NOR 04713 10H100 21520 156 1674 00 IC DIGITAL ECL GATE QUAD 2 INPUT AND SCRN 04713 10H104 Al2U525 156 1700 00 IC
180. 701 10K 5 0 25w ALOR285 315 0103 00 RES FXD FILM 10K 5 0 25 19701 10K 5 0 25w ALOR295 315 0103 00 RES FXD FILM 10K 5 0 25 19701 10K 5 0 25w ALOR313 315 0102 00 RES FXD FILM 1K 0HM 52 0 25M 57668 1000 5 0 25w ALOR314 315 0202 00 RES FXD FILM 2K OHM 52 0 25W 57668 2000 5 0 25w ALOR315 315 0104 00 RES FXD FILM 100K OHM 5 0 25W 57668 00K 52 0 25w ALOR321 315 0512 00 RES FXD F1ILM 5 1K OHM 5 0 25W 57668 5100 5 0 25w ALOR322 315 0104 00 RES FXD FILM 100K 0HM 52 0 25W 5 668 100 5 0 25w ALOR323 315 0122 00 RES FXD FILM 1 2K OHM 52 0 25W 57668 1200 5 0 25w ALOR324 315 0202 00 RES FXD FILM 2K 52 0 25 57668 2000 5 0 25w ALOR325 315 0221 00 RES FXD FILM 220 0HM 52 0 25W 57668 220 5 0 25w ALOR327 315 0220 00 RES FXD FILM 22 0HM 52 0 25W 19701 22 5 0 254 ALOR328 315 0103 00 RES FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w ALOR329 315 0513 00 RES FXD FILM 51K 0HM 52 0 25W 57668 51K 52 0 25w ALOR338 321 0305 00 RES FXD FILM 14 7K 0HM 12 0 125W TC TO 91637 CMF55116G 14701 ALOR340 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 57668 100 5 0 25w ALOR350 315 0101 00 RES FXD FILM 100 0HM 52 0 254 57668 100 5 0 25w 108418 315 0103 00 FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w ALOR423 315 0102 00 RES FXD FILM 1K 0HM 52 0 25MW 5 668 1000 52 0 25w ALOR427 315 0102 00 RES FXO FILM 1K OHM 52 0 25W 5 668 1000 5 0 25w 108428 321 0414 00 RES FXD FILM 2XK 0HM 12 0 125W TC TO 9163 7 CMF55116G20002F ALO
181. 721 00 307 0721 00 307 0587 00 307 0587 00 317 0680 00 315 0680 00 307 0587 00 315 0680 00 315 0102 00 317 0101 00 307 0811 00 307 0587 00 307 0587 00 315 0181 00 315 0101 00 315 0201 00 317 0680 00 307 0587 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 131 0608 00 Seria Number Effect Discont 8010884 Replaceable Electrical Parts 1241 Addendum Part Name amp Description RES FXD FILM 680 OHM 5 0 25W RES FILM 100 0HM 52 0 25W RES FXD CMPSN 560 OHM 5 0 125W RES FXD FILM 2 7K 0HM 52 0 25W RES NTWK FXD F1 7 68 20 0 1254 RES NTWK FXD FI 7 68 0HM 20 0 125W RES FXD FILM 68 5 0 25 RES FXD CMPSN 100 52 0 125 RES FXD FILM 68 OHM 52 0 25W RES FXD FILM 68 5 0 254 RES NTWK FXD F1 7 68 202 0 1254 RES FXD CMPSN 100 OHM 52 0 125W RES VAR NONWW TRMR 200 H4 0 5W RES FXD CMPSN 220 0HM 52 0 125W RES FXD CMPSN 100 OHM 52 0 125W RES NTWK FXD F1 7 68 20 0 1259 RES F1 768 00M 202 0 1254 RES 7 68 20 0 1259 RES FT 7 68 OHM 20 0 125W RES 510 52 0 25 RES VAR NONW4 TRMR 200 OHM 102 0 5M RES FXD FILM 1K OHM 52 0 25W RES FXD FILM 330 OHM 5 0 25W RES FXD FILM 47 0HM 52 0 25W RES FXD FILM 68 5 0 25 4 RES 1 5 W RES
182. 782 00 CAP ELCTLT 4 7UF 75 20 35VDC 55680 UVXIVAR MAA 13 271 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 SA105E104MAA 13 274 281 0813 00 CAP FXD CER 01 0 0470 20 50 04222 SA105E473MAA AL3C280 281 0785 00 CAP FXD CER DI 68PF 10 100V 04222 SA101A6B80KAA A13C317 283 0784 00 DI 40PF 2 500V 09023 015 0400603 13 324 283 0177 00 CAP FXD CER DI 1UF 480 202 25V 18796 RPE1137500105750V A13C327 283 0177 00 CAP FXD CER DI 1UF 480 202 25V 18796 RPE11325U0105750V 13 328 283 0177 00 CAP FXD CER DI 1UF 80 20 25V 18796 RPE11375U0105Z50V 13 331 290 0746 00 FXD ELCTLT 47UF 50 20 16 TKO900 SM35VB47RMBX11LL A13C333 285 1100 00 PLASTIC O O22UF 52 200V 19396 223002 485 13 341 283 0177 00 DI 1UF 80 202 25V 187 RPE11375U0105Z50V A13C347 283 0065 00 CAP FXD CER DI 0 001UF 52 50V 59660 0835 591 5 0 102 A13C348 290 0922 00 ELCTLT LOOOUF 202 50V TKO900 SM5OVB1O2MI6X3O0LL 13 357 290 0966 00 CAP ELCTLT 220UF 50 20 25V 55680 TLBIE221MAA AL3C371 290 0922 00 CAP FXD ELCTLT 1000UF 20 50V TK0900 SM50VB102M16X30LL 1 21 283 0781 00 DI 27PF 5 500V 09023 CD15ED270J03 A13C424 283 0212 00 CAP FXD CER 01 20 20 50 18796 RPE114 25 205M50V 13 425 283 0194 00 CAP FXD CER 01 4 70 202 50 18796 RPE117 Z75U 47MO5OV 13 29 283 0212 00 CAP FXD CER DI
183. 8 2X 20319 402 1214 05 00 0541C ORDER BY DESCRIPTION 174 0003 00 196 3060 00 175 2423 00 174 0003 00 11 352 386 4865 00 ORDER BY DESCRIPTION REV JAN 1990 Replaceable Mechanical Parts 1241 Addendum Fig amp fades Tektronix Serial Number Mfr No Part Number Effect Discont Qty 12345 Part Name amp Description Code Mfr Part Number 2 17 334 5013 01 8010100 8010150 1 EMBLEM SMOKE 80009 334 5013 01 334 0094 00 010151 1 EMBLEM SMOKE TAN W O STUD TK1610 ORDER BY DESCRIPTION 78 334 4785 01 1 MARKER IDENT MKD INSTRUMENT NUMBER 80009 334 4785 01 79 174 0086 00 1 BRAID ASSY WIRE 4 75 L TK2156 61953 REV JAN 1990 11 7 Replaceable Mechanical Parts 1241 Addendum 6 0 8688 03 ORDER BY DESCRIPTION 407 2892 01 CSJ 505 10 5KCT 821 01655 024 214 0579 00 1 24602 0325 75060 012 131 1003 00 48283 036 174 0081 00 ORDER BY DESCRIPTION STP3001 ORDER BY DESCRIPTION 7721 7PPS 211 041800 00 10 21 023 106 IRF641 94 156 ORDER BY DESCRIPTION 7721 7PPS 211 041800 00 10 21 023 106 337 3204 00 26 51 2073 48283 036 000201 4338 ORDER BY DESCRIPTION MTH8N40 ORDER BY DESCRIPTION 7721 7PPS 211 041800 00 64 21 023 212 350 ORDER BY DESCRIPTION 7721 7PPS 211 041800 00 10 21 023 106 PB1 2CB 214 3798 00 ORDER BY DESCRIPTION 211 041800 00 09 60 1021 6 0 7534 15 214 3379 00 ORDER BY DESCRIPTION 7905C 12161 50 7721 7PPS Fig amp Index Tektronix Serial
184. 8 0911 00 COIL RF FIXED 65UH TK1345 108 0911 00 07L171 108 1146 00 COIL RF FXD 18UH TK1345 108 1146 00 4071232 108 0808 00 COIL RF FIXED 500UH TK1345 108 0808 00 351 108 0911 00 COIL RF FIXED 65UH TK1345 108 0911 00 071362 108 0585 00 COIL RF FIXED 116UH TK1345 108 0585 00 71363 108 0317 00 COIL RF FIXED 15 UH 32159 71501 10 071445 108 1147 00 COIL RF FXD 122UH TK1345 108 1147 00 71451 108 0909 00 COIL RF FIXED 1 6MH TK1345 108 0909 00 71461 108 1137 00 COIL RF FIXED 3 2MH TK1345 108 1137 00 A07P444 131 0993 00 BUS CONDUCTOR SHUNT ASSEMBLY BLACK 22526 65474 006 070273 151 0192 00 TRANSISTOR SI TO 92 04713 56521 070283 151 0453 00 TRANSISTOR PNP SI TO 92 27014 2N508 FAMILY 4070284 151 0432 00 TRANSISTOR NPN 51 625 TO 92 04713 58099 FMLY 070341 151 0710 00 TRANSISTOR NPN SI TO 92 PLUS 04713 2N6715A_FMLY 40 0371 151 0503 00 SCR SI TO 92 04713 2 50 10 0379 151 0190 00 TRANSISTOR NPN SI TO 92 04713 283904 4070385 151 0710 00 TRANSISTOR NPN SI TO 92 PLUS 04713 2N6715A_FMLY 4070387 151 0622 00 TRANSISTOR 51 40 1 0 226 237 04713 26 2 40 0421 151 06 9 00 TRANSISTOR NPN ST T0 220 04713 MJE13009 40 0422 151 0679 00 TRANSISTOR NPN ST TO 220 04713 13009 4070441 151 0622 00 TRANSISTOR PNP SI 40V TO 226AE 237 04713 26 2 070445 151 0710 00 TRANSISTOR NPN SI TO 92 PLUS 04713 2N6715A FMLY 070446 151 0622 00 TRANSISTOR
185. 8 685 0 2 AL3R220 311 1862 00 RES VAR NONWW TRMR 5K OHM 0 5W 73138 82PR5K 102C ALR221 315 0680 00 RES FXD FILM 68 0HM 52 0 25W 5 668 68 5 0 25w AL3R222 311 0643 03 RES VAR NONWW TRMR 50 0HM O 5W 73138 amp 82PR50 3818 A 38223 315 0154 00 RES FILM 150K 0HM 52 0 25W 57668 150K 5 0 25w AL3R224 315 0243 00 RES FILM 24K 0HM 52 0 25W 57668 24K 5 0 25w AL3R225 315 0302 00 RES FXD FILM 3K OHM 5 0 25W 5 668 3000 5 0 25w AL3R226 321 0234 00 RES FXD FILM 2 67K 0HM 12 0 1254 TC TO 91637 CMF55116326700F AL3R231 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 57668 100 5 0 25w AL3R232 321 0215 00 RES FXD FILM 1 69K 0HM 12 0 125W TC TO 91637 CMF55116G16900F AL3R233 315 0394 00 RES FXD FILM 390K 0HM 52 0 25W 57668 390K 5 0 25w AL3R235 315 0512 00 RES FXD FILM 5 1K 0HM 52 0 25W 57668 5100 5 0 25w 13 23 315 0513 00 RES FXD FILM 51K OHM 5 0 25W 57668 51K 5 0 25w A3R238 315 0513 00 RES FXD FILM 51K 0HM 52 0 25W 57668 51K 5 0 25w AL3R245 315 0104 00 RES FXD FILM 100K 0HM 52 0 25W 57668 100K 5 0 25w AL3R246 315 0100 00 RES FXD FILM 10 0HM 52 0 25W 19701 10 52 0 25w AL3R250 315 0124 00 RES FXD FILM 120K 52 0 25 19701 120K 5 0 25w 138251 308 0365 00 RES FXD WW 1 5 0HM 52 3W 01637 CW2B 1R500J T R 1 38266 321 0108 00 RES FXD FILM 130 OHM 12 0 125W TC TO 91637 CMF55116G130R0F A13R267 321 0176 00 RES FXD F1LM 665 0HM 12 0 125W TC TO 91637 CMF55116G665ROF AL3R268 321 0607 00 RES FXD FILM 80 0HM 12 0 1254 TC TO 916
186. 80 204 50V 04222 MD015E473ZAB 15 341 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E47374B 5 345 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E4737AB A5C347 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 0015 4732 15 352 283 0422 00 01 0 047 80 20 50 04222 MD015E4737AB AL5C355 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E4737AB AL5C365 283 0422 00 CAP FXD CER 01 0 047UF 80 20 50V 04222 MD015E4737AB A15C3 5 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 0015 473 15 390 290 0778 00 1UF 202 50V NPLZD TK0900 SM BP D 50VBIRO M 5 AL5C385 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 M0015E4737A4B AL5C400 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E4737AB 15 410 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E473ZAB 15 414 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 0015 4737 AL5C420 283 0422 00 0 DI 0 047UF 80 202 50V 04222 AL5CA30 283 0422 00 D1 0 047UF 80 202 50V 04222 0015 4737 A150447 283 0422 00 CAP FXD CER 01 0 0470 80 20 50 04222 MD015E47374B A1 5CA55 281 0765 00 DI 100PF 52 100V 04222 5 102 1010 15 456 281 0765 00 CAP FXD CER DI 100 5 100 04222 SA102A101JAA AL5CA57 283 0422 00
187. 88 00 119 1088 01 119 1088 00 119 1088 119 1 119 1 119 1416 119 1380 119 1380 WWW eee t 1 38 88888 88888 88888 88888 131 0608 131 0608 131 0608 131 0608 131 0608 131 0608 131 0608 131 0608 131 0608 131 0608 131 0608 131 2221 131 2221 131 0608 00 131 0993 131 0993 131 0993 131 0993 131 0993 131 0993 131 0993 131 0993 131 0993 131 0993 131 0993 131 0993 307 0587 315 0471 315 0561 8588 8888888 88888 Serial Number 8010884 010100 8010445 8010100 8010445 Effect Discont 10444 10444 Replaceable Electrical Parts 1241 Addendum Part Name amp Description FXD CER 01 33 PF 52 50V DI 0 047UF 80 202 50V DI 100PF 5 100V CER DI 0 047UF 880 203 50 FXD DI 0 047UF 80 20 50V FXD CER 01 22 10 100 FXD CER 01 0 047 480 20 50 FXD FXD CER DI 0 047UF 80 20 50V FXD CER 01 10PF 10 100V FXD CER DI 47PF 10 100V DI 0 047UF 80 20 50V CAP FXD CER DI 0 047UF 80 20 50V CAP FXD CER DI 22PF 10 100V SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 SEMICOND DVC DI SW SI 30V 150MA 30 D0 35 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 DELAY LINE ELEC 4NS 100 OHM DELAY LINE ELEC 4NS 100 OHM DELAY LINE ELEC 4NS 100 OHM DELAY LINE ELEC 4NS 100 OHM DELAY LINE ELEC 10NS 1
188. A01 680 OR MSPO AL2R422 315 0680 00 RES FXD FILM 68 0HM 52 0 25W 57668 68 5 0 254 128437 315 0680 00 RES FXD FILM 68 0HM 52 0 25W 5 668 68 5 0 254 AL2RA4M 315 0680 00 RES FXD FILM 68 0HM 52 0 25W 57668 68 5 0 25w Al2R445 315 0512 00 RES FXD FILM 5 1K 0HM 52 0 25W 57668 5100 5 0 25w AL2R446 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w 28450 307 0587 00 RES NTWK FXD FI 7 68 20 0 125 91637 CSCOBAO1 680 OR MSPO AL2R45 2 315 0680 00 RES FXD F1LM 68 0HM 52 0 25W 57668 68 5 0 25w 28455 307 0587 00 RES 7268 0HM 202 0 125W 91637 CSCOBAO1 680 OR MSPO AL2R460 315 0201 00 RES FXD FILM 200 OHM 5 0 25W 57668 200 5 0 25w AL2R465 307 0587 00 RES NTWK FXD FI 7 68 0HM 202 0 125W 91637 CSCO8A01 680 OR MSPO 2466 307 0587 00 RES NTWK FXD FI 7 68 209 0 125 91637 CSCO8A01 680 OR MSPO 12 470 315 0102 00 RES FXD FILM 1K 5 0 25 57668 1000 5 0 25w ALZR481 315 0680 00 RES FXD FILM 68 5 0 25 57668 68 5 0 25w 126482 315 0511 00 RES FILM 510 0HM 52 0 25W 19701 510 5 0 25w 126494 315 0182 00 RES FXD FILM 1 8K 0HM 52 0 25W 57668 1800 5 0 25w AL2RA85 315 0181 00 RES FXD FILM 180 OHM 54 0 25W 57668 180 5 0 25w AL2RA86 315 0271 00 RES FXD FILM 270 0HM 52 0 25W 57668 270 5 0 25w 128490 315 0821 00 RES FXD FILM 820 0HM 52 0 25W 19701 820 5 0 25w AL2R492 315 0680 00 RES FXD FILM 68 0HM 52 0 25W 57668 68 5 0 25w 128495 315 0102 00 RES FILM
189. A12U208 to see that they are going low Check that the LOADC L signal at pin 8 A12U430 is pulsing low Suspect A12U430 U100 U108 U110 U125 U205 U208 U310 U170 or U105 Suspect the Video Generator A12U235 and U230 Check the 9 8 MHz clock at pin 6 on A12U305 Check pin 2 on A12U420 for a low Suspect A12U305 or U420 Check pin 7 on A12U420 for a high Suspect A12U420 Explanation While scrolling horizontally an incorrect pattern was read back The pattern expected was E3rex Probable Cause The 9 8 MHz clock was not inverted Action Check the 9 8 MHz clock at pin 6 on A112U305 Check 2 on A12U420 for a high Suspect A12U305 or U420 8 61 Troubleshooting and Repair 1241 Addendum 3314 Error index Explanation While scrolling horizontally an incorrect pattern was read back The expected pattern was 8Frex Probable Cause Action The 9 8 MHz clock was not inverted Check the 9 8 MHz clock at pin 6 on A12305 Check pin 2 on A12U420 for a high Suspect A12U305 or U420 8 62 Troubleshooting and Repair 1241 Addendum 64 845 420 q 62 8 aunbi4 17110925 25 1003201 401 SHAO 4440 0000 U311YNHO3 SPINUS aasa 34400000 ven oe Spin Non w e 1
190. A3 R600D E4 A3 J508 E4 A3 R600F E3 A3 J508 ES A3 R600G E3 A3 P650 FS E4 R630 C5 B4 P650 A3 E4 TP425 E2 B3 R305 A2 2 626 2 4 R420A E3 B3 U400 Al A3 R420B E3 B3 U410A A4 A3 R420C F2 B3 U435B A4 C2 R420D E4 B3 U450A B4 D2 R420E 4 B3 U451A C4 D2 R420F F2 B3 U451B B4 D2 R420G C3 B3 U470B B5 E2 R422 D5 B3 U475A C2 E2 R437 D2 C3 U475B C4 E2 R444 C4 C3 U500 F1 A3 R450A B3 D3 U505 F1 A3 R450B B4 D3 U510A E2 A3 R450C D3 U510B D5 A3 R450D A3 D3 US10C E2 A3 R450F C2 D3 U510D A3 A3 R455A B4 D3 U515 F3 B3 R455B B3 D3 U520 F2 B3 R455C B3 D3 U525 E2 B3 R455D B4 D3 U530A C3 C3 R455E A3 D3 U530B E3 C3 R455F A3 D3 U530C D1 C3 R455G A3 D3 U530D D2 C3 R460 B4 D3 U535 D1 C3 R465E BS D3 U540A C2 C3 R465F A5 D3 U540B C3 C3 R465G C3 D3 U545A C2 C3 R466A C2 D3 U545B C2 C3 R466G C1 D3 U550B B3 D3 R482 B4 E3 U550C B5 D3 R505A F2 A3 USSSA B3 D3 R505B F2 A3 U555B B3 D3 R505C F5 A3 U600 F4 A4 R505D F5 A3 U605 A4 R505E E5 A3 U608A ES A4 R505F D2 A3 U608B D4 A4 R505G C2 A3 U610A E3 B4 R510A F3 B3 U610B D3 B4 R510B F3 B3 U615A E5 B4 R510C D5 B3 U615B F5 B4 R510D D2 B3 U615C B2 B4 R510E D3 B3 U620A E5 B4 R510F F5 B3 U620B E5 B4 R510G E5 B3 U620D F5 B4 R530A F3 C3 W440 B1 C2 R530B F3 C3 READ I H 4825 CT READ 2 047 0500 MC3431 U4oo 74C374 DL INDICATES DELAY LINE THAT IS ETCHED RUN ON THE CIRCUIT BOARD 2
191. AL PIN 0 365 X 0 025 PH BRZ GOLD PL 22526 48783 036 AL5TP325 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 ALSTP665 131 0608 00 TERMINAL 0 365 L X 0 025 PH BRZ GOLD PL 22526 48783 036 Al5U100 156 2172 00 IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 2 014 10422 Al5U115 156 2172 00 IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 2 014 10422 AL5U120 156 2172 00 IC MEMORY ECL SRAM 256 X 4 1385 DIP24 4 2 014 10422 AL5U125 156 2172 00 IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 2 014 10422 A15U135 156 2172 00 IC MEMORY ECL SRAM 256 X 4 13NS DIP24 4 27014 10422 A15U140 156 1642 01 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT 04713 10H105 Al5U145 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 A150150 156 1038 01 IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 07263 10016 Al5U155 156 0295 02 IC DIGITAL ECL TRIPLE 2 INPUT XOR OR 04713 10107 AL5U160 156 1226 00 MICROCKT LINEAR DUAL COMPARATOR 64155 LM319N A15U165 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 A15U170 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74C374 A15U175 156 1311 01 IC CONVERTER BIPOLAR D A 8 BIT 5018 DIP22 4 18324 5018 50245 156 1647 00 IC LINEAR BI POLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 Al5U250 156 1038 01 IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 07263 10016 Al5U255 156 1038 01 IC DIGITAL ECL COUNTER 4 BIT BINARY 10016 07263 10
192. AL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 AL4TP534 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 Al4TP535 131 0608 00 TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL 22526 48283 036 Al4TP536 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 0 AIATP538 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 AL4TP563 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 AIATP645 131 0608 00 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL 22526 48283 036 AIATP646 131 0608 00 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL 22526 48283 036 Al4TP648 131 0608 00 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL 22526 48283 036 Al4TP649 131 0608 00 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL 22526 48283 036 AL4TP654 131 0608 00 TERMINAL 0 365 X 0 025 PH BRZ GOLD PL 22526 48283 036 AI4TP660 131 0608 00 TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL 22526 48283 036 14 695 131 0608 00 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL 22526 48283 06 140110 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 365 04713 3431 3651 140115 156 0760 01 IC DIGITAL ECL LATCH QUINT D TYPE 10175 04713 10175 Al4U120 156 1700 01 IC MEMORY ECL SRAM 16 X 4 6NS DIP16 3 04713 10H145 140125 156 1700 01 IC MEMORY ECL SRAM 16 X 4 685 DIP16 3 04713 101145 A14U130 156 1700 01 IC MEMORY ECL SAM 16 X 4 6NS DIP16 3 04713 10H145 Al4U133 156 1700 01 TC MEMORY ECL SP
193. AL 18 AWG 5 5 L 5 4 TK1386 ORDER BY DESCRIPTION 07W42 195 1033 00 LEAD ELECTRICAL 26 2 0 1 9 2 80009 195 1033 00 A07W432 175 3114 00 WIRE ELECTRICAL STRD 18 AWG GRAY PVC 80009 175 3114 00 A08 670 7528 0 CIRCUIT BD ASSY INTERFACE 80009 670 7528 07 4080100 283 0422 00 DI 0 047UF 80 20 50V 04222 0015 4737 A08C110 283 0422 00 DI 0 047UF 80 20 50V 04222 0015 4737 8 122 283 0422 00 DI 0 047UF 480 202 50V 04222 0015 4737 8 130 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MD015E4737AB A08C140 283 0422 00 DI 0 047UF B0 208 50V 04222 0015 4737 ADBRC300 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 15 473 8 310 283 0422 00 DI 0 047UF 80 202 50V 04222 MDO15E4737AB A08C320 283 0422 00 DI 0 047UF 80 20 50V 04222 MDO15E4737AB 8 325 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E4737AB A08C330 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E4737AB A08C335 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MDO15E473ZAB A08C340 283 0422 00 DI 0 047UF 80 202 50V 04222 0015 4732 8 345 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E4737AB A08C500 283 0422 00 DI 0 047UF 80 20 50V 04222 MDO15
194. AL3R341 315 0100 00 RES FXD FILM 10 0HM 5 0 25W 19701 10 5 0 25w AL3R342 315 0100 00 RES FXD FILM 10 0HM 52 0 25W 19701 10 5 0 25w AL3R343 315 0561 00 RES FXD FILM 560 OHM 5 0 25W 19701 560 5 0 25w AL3R345 315 0223 00 RES FXD FILM 22K 0HM 52 0 25W 19701 22K 5 0 25w AL3R346 315 0162 00 RES FXD FILM 1 6K OHM 5 0 25W 19701 1600 5 0 25w 9 22 REV JAN 90 Replaceable Electrical Parts 1241 Addendum Serial Number Mfr Effect Discont Part Name amp Description Code Tektronix Part Number Mfr Part Number Component No AL3R353 AL3R418 A13R422 138425 A13R426 A13R427 A13R431 AL3RA32 138433 138435 AL3R452 A13R466 Al3R467 13 533 AL3R535 AL3R540 AL3R541 A13R552 AL3R553 A13R555 A13R556 A13R557 AL3R562 A13R565 A13R566 AL3R567 136571 A13R578 A13R652 A13R665 66 AI3T411 137411 13 435 AL3TP148 AL3TP178 205 AI3TP210 AI3TP223 224 238 242 270 AI3TP315 AI3TP340 4 AL3TP372 AL3TP430 456 1 70 AL3TP524 AL3TP534 A131P551 A13TP565 569 Al3TP636 650 A13U117 REV JAN 90 303 0243 00 308 0677 00 321 0385 00 315 0472 00 321 0412 00 321 0756 00 315 0912 00 315 0472 00 321 0289 00 317 0102 00 303 0201 00 321 0109 00 321 0199 00 315 0474 00 311 2296 00 325 0399 00 325 0399 00 315 0682 00 315 0100 00 31
195. AM 16 X 4 645 DIP16 3 04713 101145 A14U135 156 1700 01 IC MEMORY ECL SRAM 16 X 4 6NS DIP16 3 04713 10H145 140140 156 1733 00 IC DIGITAL ECL GATE QUAD OR NOR SCRN 04713 101101 140145 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 140150 156 1339 00 MICROCKT LINEAR HIGH SPEED DUAL DIFF COMPTR 18324 NE521N SUPRII B Al4U155 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 140160 156 2142 00 IC DIGITAL ECL COUNTER 4 BIT 109016 04713 109016 140165 156 2142 00 IC DIGITAL 4 109016 04713 109016 40170 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74C374 140175 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 2 014 740374 140190 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 2 014 4 374 Al4U185 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 2 014 74C374 141190 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 740374 A14U210 156 1647 00 IC LINEAR BIPOLAR COMPARATOR QUAD 3431 3651 04713 3431 3651 140215 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 109131 140220 156 2142 00 IC DIGITAL ECL COUNTER 4 BIT BINARY 10H0 l6 04713 109016 140223 156 2142 00 IC DIGITAL ECL COUNTER 4 BIT BINARY 10H016 04713 10H016 Al4U225 156 2142 00 IC DIGITAL ECL COUNTER 4 BIT BINARY 10HOl6 04713 10H016 140230 156 2142 00 IC DIGITAL ECL 4 BINARY 10HOl6 04713 109
196. AME AS AT FIG 8 8 SUSPECT U236 0336 Q334 CHECK THAT THE RUN FROM U336 NO PIN 7 TO 0534 GATE IS 120 TROUBLESHOOT HIGH VOLTAGE CIRCUIT CONT DOES DUTY CYCLE AT TP344 VARY WITH V VOLTAGE APPLIED FIG 8 6 YES DOES VOLTAGE YES REMOVE AT TP534 V4 FROM VARY WITH R203 FIG 8 5 DOES THE DC VOLTAGE ON TP524 VARY WITH V SUSPECT Q334 CR337 VR336 T435 CR528 C528 YES IS Q534 GATE DRIVE VOLTAGE PRESENT FIG 8 5 YES SUSPECT CR521 CR626 CR622 C520 C547 C544 IS TP630 AT 60V TP636 AT 60V VR533 AT 500V SUSPECT 0534 C537 NO C625 VR533 VR531 VR530 R533 C635 Figure 8 2 1241 CRT Drive Board troubleshooting tree cont 8 18 Troubleshooting and Repair 1241 Addendum Q TROUBLESHOOT FEEDBACK CONTROL LOOP APPLY V 5 3V TO THE CAPACITOR SIDE OF R203 IS IS THERE SUSPECT A SHORT 9 VOLTS ON ied PUN NO ON THE 12V SUPPLY ANODE OF ON R321 LINE CHECK THE VR321 i POWER SUPPLY YES YES SUSPECT SUSPECT T411 CR325 C331 VOLTAGE R321 VR321 ON TP430 C333 R325 8331 R334 CR332 eee WN U CR333 CR334 CHECK R332 C327 CIRCUIT CONTINUITY NOTE GROUND PROBE TO TP224 WHEN YES CHECKING TP430 PROBE TP430 ON 200mV DIV VARY 50 V lt V lt
197. BBES SSSSS SSB 8 885888 888888 Replaceable Electrical Parts 1241 Addendum Part Name amp Description IC DIGITAL CMOS FLIP FLOP OCTAL 0 IC DIGITAL LSTTL GATES sHEX INV 741504 LINEAR BIFET DUAL OPNL SCRN IC DIGITAL CMOS COUNTER DUAL 4 BIT BINARY IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER IC DIGITAL ECL BUFFER DRIVER HEX WITH IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL 00 0 2 INPUT AND SCRN IC DIGITAL ECL GATES QUAD 2 INPUT NOR IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL LSTTL COUNTER SYNCH 4 BIT BINARY IC MEMORY ECL SRAM 1K X 1 100NS DIP16 3 IC MEMORY ECL SRAM 1K X 1 100NS DIP16 3 IC DIGITAL ECL BUFFER DRIVER HEX WITH IC MEMORY ECL SRAM 1K X 1 100NS DIP16 3 IC DIGITAL ECL BUFFER DRIVER HEX WITH IC MEMORY ECL SRAM 1K X 1 100NS DIP16 3 IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT IC DIGITAL ECL GATE DUAL 2 WIDE 2 3 INPUT IC DIGITAL ECL GATE QUAD OR NOR SCRN IC DIGITAL ECL MUX DUAL 4 TO 1 10H174 IC DIGITAL CM0S FLIP FLOP OCTAL D TYPE MICROCKT DGTL LSTTL 3 STATE OCTAL BFR SCRN IC DIGITAL LSTTL SHIFT REGISTER 4 BIT IC DIGITAL LSTTL SHIFT REGISTER 4 BIT MICROCKT DGIL FRONT END CIRCUIT MICROCKT DGTL FRONT END CIRCUIT M
198. C2 C410 B2 A4 T261 EZ D2 C411 D2 B4 T431 D2 427 D1 B4 1432 D2 C3 C451 E3 D4 161 01 460 D4 E3 TP162 F4 1 465 B2 E4 171 4 1 C472 2 E4 172 B4 1 C487 D5 F4 173 5 1 CR151 B2 D1 TP181 E3 F1 CR152 A2 D1 TP182 F2 F1 CR153 B2 D1 TP183 F1 F1 CR154 A2 D1 TP184 F2 F1 CR211 B1 B2 TP185 F2 F1 CR251 ET D2 TP411 C2 B4 CR252 E1 D2 TP421 D1 B4 CR253 E2 D2 TP422 D1 B4 CR254 2 D2 U181 1 2 CR255 E3 D2 U275A D4 E2 CR262 D3 E2 U275B D3 E2 CR266 D3 E2 U275C D3 E2 CR267 D3 2 U275D D3 E2 CR271 D3 E2 U371 C3 E3 CR276 D3 F2 U375 C2 E3 CR281 B4 F2 U385A E5 F3 CR282 B4 F2 U385B C5 F3 CR285 B3 F2 U471 F2 E4 CR341 2 D3 U481 F2 F4 CR342 E2 D3 VR271 B4 E2 CR372 B3 E3 VR375 E4 E3 CR381 B3 F3 VR481 B4 F3 CR382 B3 F3 W100 F3 Off Bd CR411 D2 B4 W110 F3 Off Bd CR412 D2 B4 W110 F5 Off Bd CR421 D1 B4 W111 F1 Off Bd CR423 D1 B4 W120 F4 Off Bd CR424 D2 B4 W130 A4 Off Bd CR431 D1 C4 W130 F1 Off Bd CR445 2 D4 W130 F4 Off Bd CR451 E2 D4 W130 F5 Off Bd CR461 D5 E4 W181 A3 Off Bd CR471 C2 E4 W301 Al Off Bd CR472 C2 E4 W421 Not Shown B4 CR481 B3 F4 W432 D2 C3 05121 C2 1 2 W472 E2 E3 4145 PI4S 2 PRIMARY SWITCHING CIRCUIT u E 8 C408 2 pae A DIU M ee S e 1 pone SECONDARY
199. C3 U475C F3 E2 P650 F3 E4 04750 F3 E2 P650 A3 E4 U498A B4 F3 R396 C1 F2 U498B C1 F3 R397 C1 F2 04980 4 R398 A4 F2 U545C 1 C3 R445 1 C3 U545D B2 C3 R446 Al C3 550 B3 D3 R450G B2 D3 U565 D2 D3 R452 1 D3 U570 F2 E3 R465A B2 D3 U580A D1 E3 R465B C1 D3 U580B D1 E3 R465C C1 D3 U585A E1 E3 R465D C1 D3 U585B E 1 E3 R466B D2 D3 U590A E1 F3 R466C E3 D3 0590 1 R466F F2 D3 US95A B4 F3 R470 B3 E3 U595B B5 F3 R481 F3 E3 U598 A3 F3 R484 F3 E3 Y445 B1 C3 R485 VBB 9 USASC U580A US80B 0585 US85B USIOA US90B 74 5390 7415390 14 5390 74L5390 74L5390 T4 390 R446 510 4 B QA d QA I ages 3N De do 1 2619 04 7 4 4 0 9 9 A ao Sh R445 R452 our at cur 4 285 5 1K C446 MASS 0 a a nn ere 2 10 100 MHZ gt CR 12 gt 270 270 8575 2 9 180 180 US45D Es 45V 10102 COMPONENT NUMBER EXAMPLE 9570 Component Number 3V 1OHIGS C SD EE RAGGE Schematic Assembly Circuit 68 Number Subassembly Number 3 Number if used 5 b Chassis mounted components have no Assembly Number CR46G5 prefix see end of Replaceable Electrical Parts List ASYNCHRONOUS TIMEBASE gt gt E 35 P O 5 5 A11 41750 IS Q yal Q pa 4 L elo ml eos 2 lOHIO4 4 ATB H 8
200. CHNOLOGY INC 1600 N4 WASHINGTON BLVD GRANDS PASS OR 97526 1052 54473 MATSUSHITA ELECTRIC CORP OF AMERICA ONE PANASONIC WAY SECAUQJS NJ 07094 2917 54937 DEYOUNG MANUFACTURING INC 12920 NE 125TH WAY KIRKLAND WA 98034 7716 56680 NICHICON AMERICA CORP 927 E STATE SCHAUMBURG IL 60195 4526 56289 SPRAGUE ELECTRIC CO 92 HAYDEN AVE LEXINGTON MA 02173 7929 5 034 ADVANCED CIRCUIT TECHNOLOGY INC 118 NORTHEASTERN BLVD NASHJA NH 03061 5 668 ROHM CORP 8 WHATNEY IRVINE CA 92713 58361 QUALITY TECHNOLOGIES CORP 3400 HILLVIEW AVE PALO ALTO CA 94304 1319 59660 TUSONIX INC 7741 N BUSINESS PARK OR TUCSON AZ 85740 7144 60705 CORPORATION 1327 6TH AVE GRAFTON WI 53024 1831 PANASONIC INDUSTRIAL CO DIV PO BOX 1502 61058 MATSUSHITA ELECTRIC CORP OF AMERICA ONE PANASONIC WAY SECAUGUS NJ 07094 2917 61772 INTEGRATED DEVICE TECHNOLOGY 3236 SCOTT BLVD SANTA CLARA 95051 61857 SAN O INDUSTRIAL CORP 85 ORVILLE DR BOHEMIA LONG ISLAND NY 11716 2501 61892 ELECTRONICS USA INC 1 NATICK EXECUTIVE PARK NATICK MA 01760 MICROCOMPUTER DIVISION ADVANCED CIRCUITS ENGINEERING 61155 LINEAR TECHNOLOGY CORP 1630 MCCARTHY BLVD MILPITAS CA 95035 7417 66891 INTERNATIONAL ELECTRONIC INC 6 LAKE ST LAWRENCE MA 01841 3011 66958 965 SEMICONDUCTOR CORP 1000 E BELL RD PHOENIX AZ 85022 2649 73138 BECKMAN INDUSTRIAL CORP 4141 PALM ST FULLERTON CA 92635 75042 ELECTRONIC COMPONENTS 401 N BROAD ST PHILADELPHIA PA 19108 1001 75498 MULTICOMP INC 3005 SW 154TH TE
201. CKS Equipment Required digital multimeter test oscilloscope variable transformer CHECK Procedure 3A Procedure 3B Procedure 3C Procedure 3D Procedure 3D 7 Verification and Adjustment Procedures 1241 Addendum Procedure 1A Power Supply Check Procedure Test Point Locations 46856 5378 14 Figure 5 1 Expanded view of the Interface Board shows power supply measurement pins 1 Perform procedure 1 cabinet removal of the Disassembly and Installation Procedures section of the 1240 1241 Service Manual 2 Locate the set of square pins labeled J658 on the Interface Board Figure 5 1 This set of sup ply pins should be used as the reference point for all power supply measurements 3 Set the variable transformer for the appropriate low line voltage setting 90 volts when Line Se lect is set to 115 V 180 volts when Line Select is set to 230 V 4 Check all power supplies for correct voltages using a DMM on the appropriate dc volts scale The power supply may be in either the low load setup A07J444 pin 1 shorted to pin 2 or the high load setup A07J444 pin 2 shorted to pin 3 Refer to Table 5 3 for tolerances NOTE The 3 volt supply should be measured with reference to the 5 volt supply 5 8 Verification and Adjustment Procedures 1241 Addendum 5 Check all power supplies for ripple using an oscilloscope set at 0 1 V Div 5 ms Div AC input coupling and 20 MHZ bandwidth limit ON
202. CN ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTICN ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION 670 7529 00 48283 036 426 1913 01 672 1130 00 B80 00032 003 337 3072 00 337 3072 00 378 0200 00 337 3072 00 65626 150 337 3072 00 331 0486 00 ORDER BY DESCRIPTION 119 2027 01 ORDER BY DESCRIPTION 214 3103 00 ORDER BY DESCRIPTION 211 041800 00 366 1381 01 ORDER BY DESCRIPTION 601005 11 5 Replaceable Mechanical Parts 1241 Addendum Fig amp index 2 37 11 6 Tektronix 211 0022 00 386 4831 02 211 0101 00 426 1901 01 211 0101 00 211 0504 00 351 0697 00 211 0101 00 337 3127 00 337 3095 00 211 0661 00 366 1264 00 213 0153 00 333 2919 01 407 2893 01 211 0101 00 119 1725 01 210 0586 00 211 0106 00 352 0668 00 211 0101 00 214 3378 01 211 0101 00 348 0102 00 210 0586 00 334 3379 01 441 1643 03 131 1171 00 131 1315 01 311 0604 00 210 0583 00 210 0046 00 210 0853 00 175 2423 00 175 5113 00 343 0549 00 134 0026 00 386 4865 00 211 0101 00 Serial Number 2 T 2 N tN bm qu ju aea MW A A k 4 12345 Part Name amp Descri
203. CRT Drive Board bracket removal INSTALLATION HINTS If the wires to the CRT Drive Board were disconnected reconnect as follows 1 ONDA N six multi colored wires from the CRT socket to J548 one wire from the CRT socket to the ground lug flat laminated cable from the Interface Board to J470 three wire cable from rear panel to J675 wire cable from the rear panel to A13U189 1 N Brown wire from the CRT Drive Board to the ground lug 9 4 White Yellow wire from EXT TRIG IN to J187 9 White wire from EXT TRIG OUT to J288 two wire cable from the CRT Yoke to J464 10 two wire cable from the CRT Yoke to J265 11 four wire cable from the Color Shutter to J200 6 4 REV JAN 1986 Disassembly Installation Procedures 1241 Addendum PROCEDURE 9 1241 CRT amp COLOR SHUTTER REMOVAL DISASSEMBLY CRTs RETAIN HAZARDOUS VOLTAGES FOR LONG PERIODS OF TIME AFTER POWER DOWN The CRT should be serviced only by qualified personnel familiar with CRT servicing procedures and precautions USE EXTREME CAUTION WHEN HANDLING THE CRT Do not nick or scratch the glass or subject it to undue pressures during removal or installation Rough handling may cause it to violently implode When handling the CRT wear safety goggles and heavy gloves for protection 1 Perform Procedure 8 then 5 given in the 7240 1241 Logic Analyzer Service Manual BEFORE ATTEMPTING ANY WORK ON THE CRT discharge the CRT by touching the blade of a plastic
204. E L to contro the I OP Display RAM Interface It also generates the IWAIT L signal which forces the I O Processor s 280 to wait for its appropriate access time I OP DISPLAY RAM INTERFACE lt gt The interface formed by buffer A12U255 and latch U155 provides the communication link between the 1 Processor s ID data bus and the Display Board s Y data bus The I O Processor uses this link when transferring a screen image to the Display RAMs A12U145 and U245 The in terface is also used during diagnostics when the I O Processor reads back data from the Display RAMs SYNC SIGNAL GENERATION Counter A12U560 and latches U220 U480 and U415 generate the signals that synchronize the raster Counter operations on the Display Board with the display monitor operations on the CRT Drive Board Counter U560 causes a bit in latch U220 to change states at the end of each raster thus generating HDrive H Latch U480 causes a bit in U220 and a bit in U415 to change states at the end of each frame thus generating VDRIVE GREEN H RASTER COUNTER AND VERTICAL SCROLLING CONTROL The raster counter A12U280 tracks the output of the display screen s 240 raster lines 30 character lines of 8 rasters each The dual 4 bit counter is clocked by HDRIVE L The RO H R7 H raster count signals are latched by A12U480 which outputs signals RA and RB to the Vertical Scrolling Registers A12U185 and U285 RA and RB are used to indicate the top line 11 and the b
205. E VIDEO AREA 4 8 64 SSXX HIGHLIGHTING AREA 5 8 66 36XX WAVEFORM GENERATION AREA 6 8 69 Section 9 REPLACEABLE ELECTRICAL PARTS Section 10 DIAGRAMS Section 11 REPLACEABLE MECHANICAL PARTS Section 12 GLOSSARY 1241 SERVICE ADDENDUM LIST OF ILLUSTRATIONS Figure Page 2 1 External Trigger in acceptance window 2 6 2 2 TPG clock and data outputs 2 6 2 3 IZ41 CIMERSIONS eas sew dee ee obi aaa Sua pP Ve EI 2 15 3 1 fear Pal a ace ep eU eda 3 1 4 1 1241 system block diagram 4 2 4 2 1241 mainframe board locations 4 3 4 3 1241 card cage board locations 4 4 4 4 1241 cables and connections 4 5 4 5 Power Supply Board functional block diagram 4 6 4 6 CRT Drive Board functional block diagram 4 7 4 7 Display Board functional block diagram 4 11 4 8 An example of 1241 display screen memory 4 12 4 9 Display RAM memory map 4 14 4 10 Display memory access times 4 15 5 1 Expanded view of the Interface Board shows power supply measurement pi
206. E4737AB 8 510 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB A08C520 283 0422 00 CAP FXD CER DI 0 047UF 80 20 50V 04222 MD015E473ZAB 8 530 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB A08C540 283 0422 00 DI 0 047UF 80 20 50V 04222 15 473 A08C620 283 0422 00 DI 0 047UF 80 20 50V 04222 MD015E473ZAB 4080630 283 0422 00 DI 0 047UF 80 20 50V 04222 MDO15E4737AB 9 10 REV JAN 90 Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number ADBC640 283 0422 00 CAP FXD CER DT 0 047UF 480 202 50V 04222 15 473 A0BC700 283 0422 00 CAP FXD CER DI 0 047UF 80 202 50V 04222 MDO15E473ZAB A08C730 283 0422 00 CAP FXD CER DI 0 047UF 480 202 50V 04222 MD015E47 3748 A0BC810 283 0422 00 DI 0 047UF 480 202 50V 04222 MD015E473748 8 850 283 0422 00 DI 0 047UF 480 202 50V 04222 15 473 AQBF150 159 0169 00 FUSE THERMAL 15A 1200V 104 DEG 2 012 421841 9150 131 2570 01 CONN RCPT ELEC CKT 50 100 CONT FEMALE 05574 000264 0058 A08J250 131 2570 01 CONN RCPT ELEC CKT BD 50 100 CONT FEMALE 05574 000264 0058 A0BJ350 131 2570 01 CONN RCPT ELEC CKT 50 100 CONT FEMALE 05574 000264 0058 450 131 2570 01 CONN RCPT ELEC CKT BD 50 100 CONT FEMA
207. ECT VR336 YES COMPARE SIGNALS ON U138 PINS 11 AND 12 WITH FIG 8 13 DOES SIGNAL ON ua U138 PIN 1 RISE OR FALL WITH PULSES ON PIN 12 YES COMPARE TP148 TO FIG 8 14 THE SIGNAL SHOULD RISE WHEN U138 PIN 12 PULSES SUSPECT 247 U241 C253 R251 CRT YOKE TROUBLESHOOT COLOR SHUTTER DRIVER ARE ALL OTHER DISPLAY CIRCUITS OK TROUBLESHOOT APPROPRIATE CIRCUIT IS THERE 20V ON THE ANODE OF CR340 SUSPECT U347 Figure 8 2 1241 CRT Drive Board troubleshooting tree cont 8 15 Troubleshooting and Repair 1241 Addendum SUSPECT VR122 CR121 0105 0107 0123 6 HAS 12 VOLTS SUSPECT U123 8 16 15 IS THE SIGNAL THE SIGNAL ON J200 PINS NO ON U123 PIN 5 YES 1 AND 2 A 1 9KHz A 12 VOLT 1 9 2 20 VOLT SQUARE SQUARE WAVE WAVE FIG 8 10 YES NO DOES DOES 15 U123 PIN 7 J200 PIN 3 THE SIGNAL VES HAVE 12 VOLT HAVE 20 VOLT ON U138 PIN 17 N YES WAVEFORM SIMILAR 19 KHz a 5 VOLT 1 9Khz TO THAT IN SQUARE SQUARE FIG 8 11 WAVE WAVE FIG 8 11 NO DOES 0138 PIN 19 DOES YES HAVE A 5 VOLT PHASE SHIFT WAVEFORM SHOWN IN SIMILAR TO FIG 8 11 THAT IN OCCUR FIG 8 11 DOES U117 PIN 7 HAVE A 12 VOLT WAVEFORM SIMILAR TO THAT IN FIG 10
208. EL AREA COMM PACK ROUTINE DESCRIPTION The COMM pack routine tests for a correct ROM checksum in the installed COMM pack GPIB A32U245 RS232 A32U126 The COMM pack is not a normal part of the processor kernel circuitry However it is checked because proper operation is necessary for diagnostic testing 0101 LED Error Index Explanation A COMM pack was detected but was inaccessable Probable Cause Action Bad COMM pack ROM Suspect COMM pack ROM F1F1 LED Error index Explanation A checksum test on COMM pack ROM failed Probable Cause Action Bad COMM pack ROM Suspect COMM pack ROM FFFF LED Error index Explanation After completing the kernel diagnostics the I O Processor attempted to communi cate with the Control Processor but was unsuccessful The LEDs are then set to a circular rotating pattern to indicate this failure condition Probable Cause Action Control Processor kernel failure Check the LEDs on the Control Processor Board for the rotating LED pattern If LEDs indicate a problem other than the kernel repair the problem and repeat the tests Interprocessor communication queue If the LEDs on the Control Processor Board are also in failure a rotating pattern suspect the interprocessor commu nication queue consisting of A10U485 U580 U585 U590 U575 and U595 Troubleshooting and Repair 1241 Addendum 3XXX DISPLAY ERROR INDEXES Error Index Area Name Area Number 31XX RAM AREA 1 32XX VSCR
209. ER DI 0 1UF 20 50V 04222 105 104 7 282 281 0775 00 CER 1 0 20 50 04222 5 105 104 07 284 290 0804 00 CAP FXD ELCTLT LOUF 50 20 25V 55680 UVXIEIO0MAA A7 C285 290 0804 00 CAP FXD ELCTLT 10UF 50 20 25V 55680 UVXIEIOOMAA 4070321 285 1203 00 CAP FXD PLASTIC AUF 10 200V 14750 C2551 4070322 285 1203 00 CAP PLASTIC AUF 10 200V 14752 25 1070325 283 0696 00 CAP FXD MICA DI 2300PF 1 500V 09023 CD19FD232F03 4070341 281 0812 00 CER DI 1000PF 10 100V 04222 SAIOICIOZKAA 4070361 290 0844 00 CAP FXD ELCTLT LOOUF 75 20 35WVDC 54473 ECE A35V100L 4070362 283 0198 00 CAP FXD CER 01 0 22 20 50 18796 RPE122X7R224MO50V A07 C364 281 0865 00 CAP CER DI 1000PF 55 100V 04222 SAZ0lAI02JAA 4070371 283 0178 00 CAP CER DI 0 1UF 20 100V 04222 SR211C104MAA 4070372 281 0773 00 CAP FXD CER DI 0 01UF 10 100V 04222 SA01C103KAA A C378 281 0865 00 CER DI 1000PF 52 100V 04222 SAZ01A102JAA 4070379 290 0891 00 CAP FXD ELCTLT 1UF 75 10 50V 55680 UVXIHO1OMAA 407 C383 283 0198 00 FXD CER DI 0 22UF 208 50V 18796 RPE122X7R224MO5OV 407C384 290 0804 00 CAP FXD ELCTLT 10UF 50 20 25V 55680 UVXIEIO0MAA A7 C385 290 0845 00 CAP FXD ELCTLT 330UF 50 102 25V 54473 ECE A25V330L 7 386 281 0775 00 CAP DI 0 1UF 20 50V 04222 105 104 4070387 281 0773 00 CAP FXD CER DI 0
210. ES FXD FILM 1K OHM 12 0 125W TC TO 91637 CMF55116G10000F 9 8 REV JAN 90 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number A07 R271 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 57668 100 52 0 25w AY R273 315 0562 00 RES FXD FILM 5 6K 0HM 52 0 25W 57668 5600 5 0 25w AY 274 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w AY R276 321 0691 00 RES FXD FILM 42 7K 0HM 0 52 0 125W TC TO 91637 CMF551166427010 A07F277 315 0203 00 RES FILM 20K OHM 5 0 25W 57668 20K 5 0 25w 7 R282 315 0105 00 RES 1 OHM 52 0 25W 19701 1M 5 0 25w R283 315 0822 00 RES FXD FILM 8 2K OHM 52 0 25W 19701 8200 52 0 25w A07 R28A 321 0435 00 RES FILM 332K 0HM 12 0 125W TC TO 91637 CMF55116G33202F 078285 315 0224 00 RES FXD FILM 220K OHM 5 0 25W 57668 220K 5 0 25w 1078286 315 0104 00 RES FILM 100K 52 0 25 57668 100K 5 0 25w AQ7R287 321 0238 00 RES FXD FILM 2 94K 0HM 12 0 1254 TC TO 91637 CMF55116G29400F 7 R288 315 0471 00 RES FXD FILM 470 52 0 25 57668 470 5 0 25w 7289 321 0222 00 RES FXD FILM 2 00K 0HM 12 0 125W TC TO 91637 CMF55116G20000F 7 R290 315 0471 00 RES FXD FILM 470 0HM 52 0 25W 5 668 470 5 0 25w 075291 315 0334 00 RES FXD FILM 330K 0HM 52 0 25W 57668 330K 5 0 25w 407R301 308 0237 00 RES FXD WW 8 2K OHM 52 5W 91637 CW5 82000J T R 7311 308
211. HM 5 0 25W 19701 470K 5 0 25w A13R144 315 0243 00 RES 24K 0HM 52 0 25W 5 668 24K 5 0 25w AL3R146 311 1270 01 RES VAR NONW 25K OHM 0 5W 73138 82 R25K 38147 315 0224 00 FILM 220K OHM 5 0 25W 57668 220K 5 0 25w AI3R151 311 0613 00 RES VAR NONWW 100K 0 5 32997 3329H G48 104 AL3R154 307 0023 00 RES FXD CMPSN 4 7 0HM 102 0 5W 01121 EBA7GI AL3R156 315 0114 00 RES FXD FILM 110K 0HM 52 0 25W 19701 110K 52 0 25w A13R157 315 0474 00 RES FXD FILM 470K OHM 52 0 25W 19701 470 5 0 25w A13R160 311 0613 00 RES VAR NON TRMR 100K OHM 0 5W 32997 3329H G48 104 A13R161 311 0613 00 RES VAR NONWW 100K OHM 0 5W 32997 33294 648 104 13 165 311 0605 00 8010100 010182 RES VAR NONWW 200 H4 0 5W 32997 33291 48 201 AL3R165 311 0635 00 010183 RES VAR 0HM 0 5W 32997 3329H L58 102 AL3R166 315 0101 00 8010100 B010182 RES FXD FILM 100 0HM 52 0 25W 5 668 100 5 0 25w AL3R166 315 0201 00 8010183 S FXD FILM 200 OHM 5 0 25W 5 668 200 5 0 25w AL3R173 315 0202 00 RES FILM 2K OHM 52 0 25W 57668 2000 5 0 25w AI3R174 321 0030 00 RES FXD FILM 20 0 OHM 12 0 125W TC TO 91637 CMF55116G20R00F Al3R175 315 0103 00 RES FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w Al3R176 321 0147 00 RES FXD FILM 332 0HM 12 0 1254 TC TO 91637 CMF55116G332R0F 13 179 311 0643 03 RES VAR NONWW TRMR 50 OHM 0 5W 73138 82PR50 381B
212. ICROCKT DGTL FRONT END CIRCUIT IC DIGITAL GATE QUAD OR NOR SCRN IC DIGITAL ECL 2 WIDE 2 3 INPUT IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL 0 2 WIDE 2 3 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER MICROCKT DGTL HEX D MA SLAVE FF W RESET MICROCKT DGTL HEX D MA SLAVE FF W RESET MICROCKT DGTL HEX D SLAVE FF W RESET IC DIGITAL LSTTL DEMJX DECODER 3 T0 8 IC DIGITAL LSTTL DEMJX DECODER 3 T0 8 IC DIGITAL LSTTL BUS TRANSCEIVER OCTAL IC DIGITAL ECL GATE DUAL 4 5 INPUT OR NOR IC DIGITAL ECL MISC TRIPLE LINE RECEVIER CIRCUIT BD ASSY 18 CHANNEL ACQUISITION D2 ONLY CAP FXD CER 01 0 047 480 20 50 01 0 047UF 80 202 50V DI 0 047UF 480 202 50V CAP FXD CER DI 0 047UF 80 202 50V CAP FXD CER DI 0 047UF 480 202 50V CAP FXD CER DI 0 047UF 480 202 50V CAP FXD CER DI 0 047UF 80 20 50V CAP FXD CER DI 0 047UF 380 202 50V DI 0 047UF 480 202 50V CAP FXD CER DI 0 047UF 80 202 50V CAP FXD CER DI 0 047UF 80 202 50V CAP FXD CER DI 0 01UF 102 100V Mfr Code 2 014 01295 01295 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 01295 04713 04713 80009 04713 04713 04713 04713 2 014 21014 01295 01295 04713 04713 04713 04713 04713 04713 04713 04713
213. IGITAL ECL MISC TRIPLE LINE RECEVIER 04713 109116 161421 156 1674 00 IC DIGITAL ECL GATE QUAD 2 INPUT AND SCRN 04713 109104 A16U425 156 1794 00 IC DIGITAL ECL GATE 4 WIDE 04713 10121 A16U428 156 1794 00 IC DIGITAL ECL GATE 4 WIDE 04713 104121 A16U432 156 1794 00 IC DIGITAL ECL 4 WIDE 04713 10121 A16U435 156 1794 00 IC DIGITAL ECL GATE 4 WIDE 04713 109121 ALGUA3B 156 1712 00 IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER 04713 109176 A16U442 156 1712 00 IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER 04713 109176 A160445 156 1712 00 IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER 04713 109176 A16U448 156 1712 00 IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER 04713 108176 A16U453 156 1327 00 DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74C374 A160457 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74 374 16 461 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL 0 27014 74 374 ALGUA66 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74 374 A16U517 156 1640 01 IC DIGITAL ECL MISC TRIPLE LINE RECEVIER 04713 10116 A18U521 156 1794 00 IC DIGITAL ECL GATE 4 WIDE 04713 10121 16 525 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 1 131 4160528 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 10H131 A161J532 156 1794 00 IC DIGITAL ECL GATE 4 WIDE 04713 104121 160535 156 1639 01 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER 04713 109131 160538 156 1712 00 C DIGITAL ECL FLIP F
214. ING DIO ORANGE 635NM 35MA MAX LT EMITTING DIO ORANGE 635NM 35MA MAX COIL RF FIXED 2 2UH COIL RF FIXED 2 2UH RES FXD FILM 560 RES FXD FILM 560 RES FXO FILM 560 RES FXO FILM 560 RES FILM 560 560 RES FXO FILM RES FXD FILM 560 RES 7 10 OHM 2 0 15W EACH RES FXD CMPSN 15 OHM 5 1W RES NTWK FXD F1 5 220 OHM 2 0 15W EA RES 9 2 7 0HM 52 0 1504 RES NTWK FXD F1 5 1K 0HM 102 0 7W RES 5 1K 0HM 102 0 7W SWITCH PB ASSY MOMENTARY SWITCH PB ASSY MOMENTARY SWITCH PB ASSY MOMENTARY SWITCH PB ASSY MOMENTARY SWITCH PB ASSY MOMENTARY SWITCH PB ASSY MOMENTARY T 22 53 vp epp 52 0 52 0 95 0 55 0 95 0 95 0 5 0 Mfr Code 50579 50579 01121 01121 Mfr Part Number LPT 1008 LPT 1008 1M 5 0 125w 1M 5 0 125w LEDS LED56 LEDS LEDS LEDS6 LED56 LEDS 670 7529 00 SA105E473MAA SA105E473MAA SA105E473MAA SA105E473MAA SA105E473MAA SA105E47 3MAA UVX1V470MPA SA105E473MAA UVX1V470MPA SA105E473MAA SA105E473MAA SA105E473MAA SA105E473MAA SA105E473MAA MSP10A01 272J OR G MSPO6A 01 102 6 4 OR MSPO6A 01 102 G J OR 263 0019 09 263 0019 09 263 0019 09 263 0019 09 263 0019 09 263 0019 09 9 5 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr i Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number
215. ING INFORMATION INTRODUCTION POWER REQUIREMENTS FUSES varius nies eig iudi ave ate EIE 1240 POWER SWITCHES POWER UP DIAGNOSTICS THEORY OF OPERATION OVERVIEW et oe tuai LOGIC CONVENTIONS GENERAL SYSTEM DESCRIPTION OVGIVIOW EN Bee POWER SUPPLY BOARD THEORY CRT DRIVE BOARD THEORY Overview Vertical Sweep Circuit Horizontal Sweep Circuit High Voltage Grid Voltage Generation Feedback Control Loop Cathode Z Axis Amplifier Brightness Control Liquid Crystal Color Shutter and Driver COMM Pack Power Supply Trig In Level Shift And Buffer Trig Out Level Shift And Buffer 9 a 9 G e 9 9 9 6 9 e 9 n e c q o 9 a s 9 o k 6 e 666 b b a 9 9 s n aq P z n a lt a b 9 93 e G 9 6 u G P 8 9 uq a G 9 9 8 59 b 9 5 0 5 RR ua 9 9 9 9 9 8
216. ION 5 VERIFICATION AND ADJUSTMENT PROCEDURES INTRODUCTION eR RR 5 1 USING THE 1241 EXTENDER BOARDS 5 4 OPERATING THE 1241 IN THE SERVICE POSITION 5 4 Proper Cooling OF The 1247 soi usura tounge caves ER E 5 4 Taro lt x ccf oe See eek eee as 5 5 FUNCTIONAL CHECK PROCEDURES 5 5 PERFORMANCE VERIFICATION PROCEDURES 5 5 INUOGUCTION aa Hes Bees Jas 5 5 Part 1 Supply And TPG Performance Checks 5 5 Procedure 1A B Power Supply Performance Check 5 8 Procedure 2 Display High Voltage Performance Check 5 9 Procedures 3A E Test Pattern Generator Performance Check 5 10 Part 2 Functionality Checks 5 10 Part 3 Acquisition And System Performance Checks 5 10 ADJUSTMENT PROCEDURES 5 10 ed wo D PPP 5 10 Limits And Tolerances ee ox 5 10 Eguipment Hequiled 4444430004060 thd digs a 5 10 Equipment Alternatives 5 11 Adjustment Interval 5 11 Test SedueliCO tei Gi acies 5 11 Pre Adjustment Procedure 5 11 1A CRT Alignment Adjust 5 13 5 Display Board Counter
217. ION P O JI3O WIBO 5 ga 2 GND SENSE 6 7 TPIT3 2 3V SENSE Static Sensitive Devices See Maintenance Section R288 NOTE Table 10 1 shows Pinout Gnd 3 VOLT SUPPLY POWER SUPPLY BD 124 SERVICE 5378 53 POWER SUPPLY lt gt 4717 416 Figure 10 6 A12 1241 Display Board Mainframe Location 628 626 650 625 C621 5620 56 i ii Ct slit ging ul Q 05680 id i ij i i i i 14 i ri i ii i i i H e id at kaa mika ied 54 Ae de i case RASZ R455 I R4 s C458 8476 12476 C475 ig 0195 1650 14600000000 x 145 U130 5378 62 Figure 10 5 12 1241 Display Board Component Locations Table 10 5 DISPLAY RAM SCROLLING CONTROL DISPLAY BOARD ASSEMBLY A12 CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION P650 Al E4 U255 FS D2 R295 05 F1 U260 B5 D2 U105D B4 A1 U265A C5 D2 U145 ES C1 U270C C1 D2 U155 F5 D1 U275B E1 E2 U160 C5 D1 U275D C2 E2 U165 C5 D1 U280 B1 E2 U170A B4 E1 U285 D3 E2 U170B C4 E1 0290 2 U170C D3 E1 U295 B3 F2 U170D C4 E1 U298 B3 F2 U175 F1 E1 U480A E1 E2 U185 F3 E1 U480B D1 E2 U190 F3 1 U480C D1 E2 U195 C3 1 U495E D3 F3 U198 C3 1 U495F
218. IRQUIT BD ASSY 18 CHANNEL ACQUISITION 80009 670 7703 07 124002 ONLY 21 670 7539 02 CIRQUIT BD ASSY MAIN EXTENDER 80009 670 7539 02 067 1103 02 OPTIONAL ACCESSORY 2 670 8567 00 CIRCUIT BD ASSY ACQUISITION EXTENDER 80009 670 8567 00 067 1103 03 OPTIONAL ACCESSORY A31 670 7696 00 CIRQUIT BD ASSY RS232 80009 670 7696 00 1200 01 OPTIONAL ACCESSORY A32 670 7697 01 8020170 8021276 CIRQUIT BD ASSY GPIB 80009 670 7697 01 1200 02 OPTIONAL ACCESSORY 2 670 7697 02 B021277 B021374 CIRCUIT BD ASSY GPIB 80009 670 7697 02 1200C02 OPTIONAL ACCESSORY A2 670 7697 03 8021375 CIRCUIT BD ASSY GPIB 80009 670 7697 03 1200 02 OPTIONAL ACCESSORY 1 670 7620 00 8010100 8013917 CIRCUIT BD ASSY 8K RAM PACK 80009 670 7620 00 128501 ONLY OPTIONAL ACCESSORY 1 670 7620 01 013918 CIRQUIT BD ASSY 8K RAM PACK 80009 670 7620 01 12RS01 ONLY OPTIONAL ACCESSORY M2 670 7538 00 CIRQUIT BD ASSY 32K ROM PACK 80009 670 7538 00 067 1103 03 12RD01 12RS11 12RS12 OPTIONAL ACCESSORIES ro E CIRQUIT BD ASSY PT 1 NOT AVAIABLE ORDER 672 1130 00 010110 151 0252 01 SEMICOND DVC PH NPN SI 100M4 TO 18 50579 LPT 100B 10130 151 0252 01 SEMICOND DVC PH NPN SI 100M4 TO 18 50579 LPF 100B 4010150 151 0252 01 SEMICOND DVC PH NPN SI 100MW TO 18 50579 LPT 1008 4010170 151 0252 01 SEMICOND DVC PH NPN ST 100M4 TO 18 50579 1008 4010190 151 0252 01 SEMICOND DVC PH NPN SI 100M4 T0 18 50579 LPT 100B 10 317 0105 00 RES FXD CMPSN 1M OHM 52
219. K NOTE 3 1 2 5 K MANNI 1941 is 2 2 4 Re E E T TE E ER E EE aE ee gt VERTICAL SWEEP CIRCUIT LIQUID CRYSTAL COLOR SHUTTER DRIVE cis E 33 Cre t 3 COMPONENT NUMBER EXAMPLE VERT eu j E Component Number 20V ER L 35i G amp EEN YOKG R 3 iC ma 4 7 f TE AE A23 A2 R1234 37 TOTAL R245 yt 26e Meant E 244 1 Loni 03474 52 C250 b ra E Number Subassembly A bini RI20 Dae RI Pos Number if used 123 30K RBI N R138 SV J LOK R345 Rial C253 Chassis mounted components have no Assembly Number OR 1 9 W 22K OOK 2200 end of Replaceable Electrical Parts List pa R123 5 Vow 14W 5V 1 0105 RIO L J200 POF 47 013 47 2 4 9 0138 1g cif G 4 7415393 20 PALIOLS C3 P LaF RIOD 2 7 G 05 ISK BOT 5 5 1 4 E UI23A 125 20V 9 5 25 4 5 1226 R250 i 120K V Rest 7 UI Z 3 B LS EL TSC4 6M3A TO COLOR E RIA SHUTTER iSK 14W 8 23 H Ed gt
220. LE 05574 000264 0058 A0BJ550 131 2570 01 CONN RCPT ELEC CKT 50 100 CONT FEMALE 05574 000264 0058 408630 131 2401 00 RCPT ELEC 2 X 25 MALE TK1483 082 2543 9010 408650 131 2570 01 CONN RCPT ELEC CKT 0 50 100 CONT FEMALE 05574 000264 0058 8 658 131 1857 00 TERM SET PIN 36 0 025 SQ 0 1 CTRS 1 1483 082 3643 5510 9746 131 2401 00 CONN RCPT ELEC 2 X 25 MALE TK1483 082 2543 5010 A0BJ750 131 2570 01 CONN RCPT ELEC CKT 0 50 100 CONT FEMALE 05574 000264 0058 082850 131 2570 01 CONN RCPT ELEC CKT 0 50 100 CONT FEMALE 05574 000264 0058 AOBR205 307 0545 00 RES NTWK FXD FI 9 75 0HM 52 0 15W 91637 MSP10A01 750J OR CSC ADR222 307 0489 00 RES NTWK FXD FT 7 100 0HM 202 1 0W 91637 MSPOBA 01 101J OR G AOBR230 307 0489 00 RES NTWK FXD FI 7 100 0 20 1 0 91637 MSPOBA 01 101J OR G AOBR238 307 0489 00 RES NTWK FXD FT 7 100 20 1 04 91637 MSPOBA 01 101J OR G A0BR310 307 0545 00 RES NTWK FXD F1 9 75 0HM 52 0 15W 91637 MSP10A01 750J OR CSC AOBRA10 307 0501 00 RES NTWK FXD FI 5 50 0HM 52 0 1254 91637 MSP06A01 500J OR CSC ADBR510 307 0587 00 RES NIWK FXD F1 7 68 202 0 125 91637 CSCOBAO1 680 OR MSPO 511 307 0587 00 RES NTWK FXD FI 7 68 0HM 202 0 1254 91637 CSCOBAO1 680 OR MSPO ADBR610 307 0545 00 RES NTWK FXD FT 9 75 0HM 52 0 15W 91637 MSP10A01 750J OR CSC A0BU200 156 1682 00 IC DIGITAL ECL GATE DUAL 4 5 INPUT OR NOR 04713 10H109 08J300 156 1682 00 IC DIGITAL ECL GATE 4 5 INPUT OR NOR
221. LOP HEX D TYPE MASTER 04713 109176 160542 156 1712 00 IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER 04713 10176 160545 156 1712 00 IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER 04713 108176 A16U548 156 1712 00 IC DIGITAL ECL FLIP FLOP HEX D TYPE MASTER 04713 10476 A16U553 156 0469 02 IC DIGITAL LSTTL DEMUX DECODER 3 T0 8 01295 58741513882 16 557 156 1111 02 IC DIGITAL LSTTL BUS TRANSCEIVER OCTAL 01295 54041524543 A16U561 156 1277 00 MICROCKT DGTL LSTTL 3 STATE OCTAL BFR SCRN 27014 811595 16 566 156 1327 00 IC DIGITAL CMOS FLIP FLOP OCTAL D TYPE 27014 74C374 21 670 7539 02 CIROJIT BD ASSY MAIN EXTENDER 80000 670 7539 02 067 1103 02 0PTIONAL ACCESSORY 210100 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 21101 281 0775 00 D1 0 1UF 202 50V 04222 SAIO5E104MAA 21 115 281 0775 00 CAP FXD CER 01 0 1UF 209 50V 04222 SAIO5E104MAA 916120 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 SAIOSELO4MAA 01125 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 SAIOSE1O4MAA 210130 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 105 1 21150 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 54105 104 21 900 281 0775 00 CAP FXD CER DI 0 1UF 202 50V 04222 SAIO5E104MAA 210915 281 0775 00 DI 0 1UF 20 50V 04222 SAIOSE104MAA 210920 281 0775 00 CAP FXD CER D1 0 1UF 20 50V 04222 SA105E104MAA 210923 281 0775 00 CAP FXD CER D1 0 1UF 20 50V 042
222. M 52 0 25W 57668 110 5 0 25w A14R412 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w Al4R414 311 2082 00 RES NONWW 200 OHM 10 0 5W 32997 3386F 104 201 Al4R420 307 0587 00 RES NIWK FXD FI 7 68 OHM 20 0 125W 91637 CSCOBAO1 680 OR MSPO 14 424 315 0102 00 RES FXD FILM 1K OHM 52 0 25W 57668 1000 52 0 25w 148428 315 0201 00 5 200 5 0 25 5768 200 5 0 25w 14 430 307 0587 00 RES NTWK FXD FI 7 68 0HM 202 0 125W 91637 CSCOBAO1 680 OR MSPO A14R433 307 0587 00 RES NTWK FXD FI 7 68 OHM 20 0 125W 91637 5 08 01 680 OR MSPO AL4R435 307 0587 00 RES NTWK FXD FI 7 68 0HM 202 0 125W 91637 CSCOBAO1 680 OR MSPO AL4R442 315 0101 00 RES FXD FILM 100 OHM 5 0 25W 57668 100 5 0 25w Al4R445 307 0587 00 RES NIWK FXD F1 7 68 20 0 1254 91637 5 08 01 680 OR MSPO A14R456 315 0101 00 RES FXD FILM 100 OHM 5 0 25W 5 668 100 5 0 25w 14 461 315 0680 00 RES FXD FILM 68 0HM 52 0 25W 57668 68 5 0 25w AL4R462 315 0182 00 RES FXD FILM 1 8K OHM 5 0 25W 57668 1800 5 0 25w AL4R465 307 0587 00 RES NIWK FXD FI 7 68 OHM 20 0 125W 91637 5 0 01 680 OR MSPO Al4R470 307 0587 00 RES NIWK FXD FI 7 68 OHM 202 0 125W 91637 CSCOBAO1 680 OR MSPO AL4R476 315 0101 00 RES FXD FILM 100 5 0 25 5 668 100 5 0 25w Al4R480 307 0587 00 RES NTWK FXD FI 7 68 OHM 20 0 125W 91637 5 08 01 680 OR MSPO AlL4R485 307 0587 00 RES NTWK FXD FI 7 68 OHM 202 0 125W 91637
223. M TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION 81 214 0579 00 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION 82 214 0579 00 TERM TEST POINT BRS CD PL 858 ORDER BY DESCRIPTION 07TP183 214 0579 00 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION 7 184 214 0579 00 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION 07TP185 214 0579 00 TERM TEST POINT BRS CD PL 858 ORDER BY DESCRIPTION 7 11 214 0579 00 TERM TEST POINT BRS CD PL 858 ORDER BY DESCRIPTION 7 421 214 0579 00 TERM TEST POINT BRS CD PL 858 ORDER BY DESCRIPTION 07TP422 214 0579 00 TERM TEST POINT BRS CD PL TKO858 ORDER BY DESCRIPTION A07U181 156 1264 00 LINEAR BIPOLAR VOLTAGE REGULATOR NEG 12V 27014 79412 A07U275 156 0495 00 MICROCKT LINEAR OPNL AMPL 01295 LM324N 07U371 156 1261 00 IC LINEAR BIPOLAR VOLTAGE REGULATOR POS 15V 04713 78115 70375 156 1585 02 IC LINEAR BIPOLAR SW REGULATOR 3526 34333 3526 070385 156 1225 01 LINEAR DUAL COMPARATOR SCREENED 01295 LM393P3 AUT 156 0846 00 LINEAR BIPOLAR VOLTAGE REGULATOR NEG 5V 01295 7905C A07U481 156 0285 02 MICROCKT LINEAR VOLTAGE RGLTR 04713 340 12 AYNR271 152 0175 00 SEMICOND NC DT ZEN SI 5 6V 52 0 5W DO 7 04713 52635008 1N 52ARL 75 152 0217 00 DIODE ZENER 8 2V 5 0 4W 1N756A FMLY 04713 1N756A AO VR481 153 0058 00 SEMICOND NC DI SELECTED 04713 570231 1 074301 196 1157 01 LEAD ELECTRIC
224. MBLY BLACK RES NTWK FXD FT 7 68 0HM 202 0 125W RES FXD FILM 470 0HM 52 0 25W RES FXD FILM 560 0HM 52 0 25W Mfr 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 07263 07263 07263 0 263 01961 01961 01961 01961 01961 01961 01961 01961 01961 01961 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 22526 91637 57668 19701 Mfr Part Number SA102A330JAA MD015E47374B SA102A101JAA MD015E473ZAB 15 473 101 220 MD015E473ZAB 15 4 3 SALOLALOOKAA SA101A470KAA 015 4 3 MD015E47374B SA101A220KAA 1N4152 1N4152 184152 1N4152 PE 20943 PE 20943 PE 20943 PE 20943 PE 20662 PE 20662 PE 20662 PE 20661 001 PE 20662 PE 20662 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 48283 036 65626 150 65626 150 48283 036 65474 006 65474 006 65474 006 65474 006 65474 006 65474 006 65474 006 65474 006 65474 006 65474 006 65474 006 65474 006 5 08 01 680 OR MSPO 470 5 0 25w 560 5 0 25w 9 25 Replaceable Electrical Parts 1241 Addendum Tektronix Mfr Component Part Number Effect Discont Part Name amp Description Code Mfr P
225. MHz clock inverted Probable Cause Action The circuitry that inverts the 9 8 MHz Suspect the 9 8 MHz inversion circuitry A12U420 and Clock is not working 0305 The circuitry that inverts the INDEX Suspect the INDEX inversion circuitry A12U420 and signal is not working U305 8 67 Troubleshooting and Repair 1241 Addendum 18 8 S yxX20 Q LtZCL 2 8 aunbig wow 11190119 002H00v 1 110625 1 002900vY 00029900v YIOUSSA Seen 10805 183 7T3Ou2S HOH Vase 431Nn02 u3iSvu n20vo3 B3iNNOS MOT 100203 1139019 rn asd SZN NYO 3440 0906 99 lt t SPIN 4 wey f 03369 i coron t sin 1110925 LIBH Su333n8 e veovi t 100 DNINNY TG i iwa i nasa ou e s im I HINI IHD JAWOA 1 I h aaa 61 jp RE 1 Hee 6 LINIA ad chad Matar Ts arn bu c J imiuls nd dod H21Y1 Q8 uOSS32Oud 300 5300 9 9 WHOJ3JAVM 12018 Troubleshooting and Repair 1241 Addendum module DISPLAY area WAVEFORM WAVEFORM GENERATION AREA TEST DESCRIPTION The timing and glitch waveform generation circuitry is verified by writing timing an
226. MORY CONFIGURATION Width Depth no chaining 2 1240015 chained 3 1240015 chained 4 1240015 chained TIMEBASE GENERATION Clock input pulse width period amplitude Qualifier input setup time hold time SYNCHRONOUS OPERATION Data all channels Setup time Hold time Amplitude SYNC events global event for channels sequential event for all channels ASYNCHRONOUS OPERATION Data min word width guaranteed to be sampled REV NOV 1985 Performance Requirements 8 ns min 20 ns min 350 mV min above and below programmed threshoid 7 ns 0 5 ns T1 sourced from same 1240D1 350 mV min above and below programmed threshoid Timebase period 6 ns Supplemental Information 9 stored data channels 1 non stored clock qualifier channel Glitches On Glitches Off 257 513 513 1025 769 1537 1025 2049 Min time between OR d clocks is 25 ns Values based on a 1240D1 with a P6460 acquisition probe Single selected qualifier driven Uses signals specified by the operator in the Timebase menu Can be used with all timebases Data word width 14 ns min Setup and hold values based on a 1240D1 with a P6460 acquisition probe 4 ns setup time for single channel driven Hold time is 2 ns if data is acquired on one acq card and the clock source is on another acq card At max SYNC rate any input event meeting setup and hold times and minimum word width
227. Numbe mehs see end of Replaceable Esectrical Parts List The schematic diagram and circuit board component location illustration have grids A lookup table with the grid coordi nates is provided for ease of locating the component Only the components illustrated on the facing diagram are listed in the lookup table When more than one schematic diagram is used to ilustrate the circuitry on a circuit board the circuit board illustration may only appear opposite the first diagram on which it was illustrated the lookup table will list the diagram number of other diagrams that the circuitry of the circuit board appears on Modified Component Depicted in Grey or With Grey Outline See Parts List Strap or Link Plug to E C Board Box Identifies Panel ontrois Connectors and Indicators Coaxial connectors male female Plug Index signifies pin No 1 External Screwdriver Shielding Selected value see Parts List and Maintenance Section for Selection Criteria Decoupled or Filtered Voltage Refer to Diagram Number Schematic Name and Number 06 CRT DRIVE BOARD 5378 29 Figure 10 2 A13 1241 CRT Drive Board Mainframe Location Table 10 1 IC PIN INFORMATION Device Type 10016 10H100 10H101 10102 H 10103 10104 H 10H105 10H107 10117 10H131 10H164 10188 10402 6116P 2 74LS00 74S04 LS 74S08 LS 74510 741830 74S32 LS 74874 74586 7415139 7415155 7415157 74
228. Number Mfr No Part Number Effect Discont Qty 12345 Part Name amp Description Code Mfr Part Number 3 1 670 8688 03 1 CIRCUIT BD ASSY CRT DRIVE 80009 ATTACHING PARTS 2 211 0101 00 6 SCREW MACHINE 4 40 X 0 25 100 DEG STL 93907 ATTACHING PARTS 3 407 2892 01 1 BRACKET CKT ALUMINUM 80009 4 175 6420 00 4 ASSY SP ELEC 10 24 AWG 0 50 L RIBBON 57034 5 211 0661 00 6 SCR ASSEM WSHR 4 40 X 0 25 PNH STL 7 01536 6 214 0579 00 1 TERM TEST POINT BRS CD PL 80009 131 2247 00 1 TERM FEEDTHRU 3 PIN INSULATED 26742 8 136 0252 07 2 SOCKET PIN CONN W O DIMPLE 22526 9 131 1003 00 2 RCPT ELEC CKT BD MT 3 PRONG 80009 10 131 0608 00 17 TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL 22526 11 174 0081 00 1 BRAID ASSY WIRE 7 0 L 80009 12 211 0246 00 6 SCR ASSEM WSHR 4 40 X 0 625 PNH STL POZ 01536 13 151 1147 00 1 TRANSISTOR FE N CHANNEL S1 TO 220 04713 ATTACHING PARTS 14 211 0097 00 1 SCREW MACHINE 4 40 X 0 312 PNH STL 93907 15 210 1178 00 1 WASHER SHLDR 13103 16 210 0586 00 1 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 END ATTACHING PARTS 17 342 0202 00 1 INSULATOR PLATE TRANSISTOR MICA 91500 18 151 1191 00 1 TRANSISTOR FET MOS PWR 81483 ATTACHING PARTS 19 211 0097 00 1 SCREW MACHINE 4 40 X 0 312 PNH STL 93907 20 210 1178 00 1 WASHER SHLDR 13103 21 210 0586 00 1 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 ATTACHING PARTS 22 342 0202 00 1 INSULATOR PLATE
229. OARD TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD FRAME PNL CAB FRONT FINISHED CIRCUIT BD ASSY LED PT ATTACHING PARTS SCREW 6 32 X 0 625 PNH STL ATTACHING PARTS CIRQUIT BD ASSY PT 1 NOT AVAILABLE ORDER 672 1130 00 SHIELD CKT BD STATIC CABLE ASSY SP ELEC NOT AVAILABLE ORDER 672 1130 00 CIROUIT BD ASSY PT 2 NOT AVAILABLE ORDER 672 1130 00 SHIELD CKT BD STATIC FILTER LIGHT LIGHT EMITTING DIODE CIRQUIT BD ASSY LED 1 NOT AVAILABLE ORDER 672 1130 00 SHTELD CKT BD STATIC CIRQUIT BD ASSY LED 2 NOT AVAILABLE ORDER 672 1130 00 CONN RCPT ELEC CKT BD 50 CONT MALE SHIELD BD STATIC MASK CRT BLACK VINYL SHUTTER ASSY 119 2077 00 LCS IN 1241 FRAME SHUTTER ASSY SHUTTER ASSY 119 2077 00 LCS IN 1241 FRAME SPRING HLEXT 0 187 OD X 0 94 L MM NEOPRENE EXTR CHAN 0 234 X 0 156 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL PUSH BUTTON BLK POWER OFF EXTENSION SHAFT 0 95 INCH LONG SWITCH PUSH 250 W BRAKCET Mfr 80009 2 238 80009 80009 TK0435 80009 12327 TK0060 TK0060 80009 22526 80009 80009 93907 366 2159 00 ORDER BY DESCRIPTION 426 0785 00 333 2924 00 ORDER BY DESCRIPTION 129 0208 00 ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION EWT XAK01950B ORDER BY DESCRIPTICN ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTION ORDER BY DESCRIPTI
230. OHM 5i 0 25M 57668 330 5 0 25w AL6R361 315 0511 00 RES FXD FILM 510 OHM 51 0 25M 19701 510 5 0 25w AL6R362 315 0101 00 RES FILM 100 OHM 5 0 25W 57668 100 5 0 25w AL6R363 307 0598 00 RES NTWK FXD FI 7 330 OHM 2 1 0W 9163 MSPO8A01331G OR CSCO A16R364 315 0331 00 RES FILM 330 OHM 5 0 25W 57668 330 5 0 25 168365 315 0331 00 RES FXD FILM 330 OHM 5 0 25W 57668 330 5 0 25 A16R366 315 0511 00 RES FXD FILM 510 OHM 5 0 25W 19701 510 5 0 25w 6 367 315 0511 00 510 OHM 5 0 25W 19701 510 5 0 25w A16R368 315 0101 00 RES FILM 100 OHM 5 0 25W 57668 100 5 0 25w AL6R418 307 0819 00 RES NTWK FXD FI 9 62 0HM 22 0 15 EACH 91637 MSP10A01 620G OR CSC 168419 307 0824 00 RES NTWK FXD FI 4 150 OHM 2 0 3W EACH 91637 5 031516 4168420 307 0943 00 RES NTWK FXD FI 2 510 0HM 21 0 25M 91637 CSCO4A03 5116 4163421 307 0942 00 RES NTWK FXD FI 2 330 0 28 0 25 91637 CSCO4403 331G 168422 315 0151 00 RES FXD FILM 150 OHM 5 0 254 57668 150 5 0 254 168429 315 0510 00 RES FXD FILM 51 0HM 52 0 254 19701 51 5 0 25 168433 307 0587 00 RES NTWK FXD F1 7 68 OHM 20 0 125W 91637 CSCOBA01 680 OR MSPO 168437 307 0587 00 RES NTWK FXD FT 7 68 0HM 201 0 1254 91637 CSCOBAO1 680 OR MSPO AL6R440 307 0587 00 RES NIWK FXD FI 7 68 OHM 20 0 125W 91637 CSCOBA01 680 OR MSPO 168444 307 0587 00 RES 1 7 68 OHM 20 0 125W 91637 CSCOBA01 680
231. OKLYN NY 11212 2903 NORWALK CT 06852 CLEVELAND 0H 44125 4632 DOVER NH 03820 DALLAS TX 75381 RICHMOND IN 47374 WATERBURY CT 06720 NEW CUMBERLAND PA 17070 3007 SEATTLE WA 98119 2728 FRANKLIN IN 46131 SANTA CLARA CA 95051 0606 BREA CA 92621 4112 LISLE IL 60532 1613 DON MILLS ONT CAN M3A 1M EDEN PRAIRIE MN 55344 2224 GRANDS PASS OR 97526 1052 NASHUA NH 03061 SECAUCUS NJ 07094 2917 GENEVA IL 60134 3325 SANTA ANA CA 92702 ROCKFORD IL 61105 1209 COLD SPRING KY 41076 9749 DANBURY CT 06810 5803 ELGIN IL 60120 BEAVERTON OR 97077 0001 LOS ANGELES CA 90069 3501 CHICAGO IL 60630 1314 CHINO CA 91710 GARDENA CA 90249 2013 GLENDALE CA 91201 2431 NEWPORT NEWS VA 23607 6120 COLUMBUS NE 68601 3632 ROCKFORD IL 61108 5181 BURBANK CA 91502 Summerset NJ 08873 BERKELEY CA 94170 WINDSOR CA 95492 9208 REV JAN 1990 Replaceable Mechanical Parts 1241 Addendum CROSS INDEX MFR CODE NUMBER TO MANUFACTURER m Manufacturer Address City State Zip Code TK0435 LEWIS SCREW CO 4300 S RACINE AVE CHICAG IL 60609 3320 TK0508 NORTHWEST SPRING AND MFG CO 5858 WILLOW LANE LAKE OSWEGO OR 97034 5343 TK0858 STAUFFER SUPPLY CO DIST 810 SE SHERMAN PORTLAND OR 97214 TK1316 BOYD CORP 6136 NE 87TH AVE PORTLAND OR 97220 TK1386 PYRAMID ELECTRONICS SUPPLY INC 9757 JUANITA DRIVE NE KIRKLAND WA 98034 TK1456 PAPST MECHATRONIC CORP AQUIDNECK INDUSTRIAL PK NEWPORT RI 02840 483 PRODUCTS INC 45 SALEM ST PROVIDENCE RI 02907 TK1610 5
232. OLAR PLL 1391 DIP8 3 MICROCKT LINEAR TIMER LOW POWER IC MISC BIPOLAR VIDEO SUBSYSTEM VERTICAL IC DIGITAL CMOS BUFFER DUAL INVERTER 426 MICROCKT LINEAR VOLTAGE REGULATOR POS ADJ MICROCKT LINEAR BIFET DUAL OPNL AMPL SCRN IC LINEAR BIPOLAR OP AMP HIGH VOLTAGE 1436 IC LINEAR BIPOLAR VOLTAGE REGULATOR POS SEMICOND DVC DI ZEN SI 11V 5 0 4W SEMICOND DNC DT ZEN ST 11V 52 0 4W SEMICOND DVC DI ZEN SI 11V 52 0 4M SEMICOND OVC DI ZEN SI 9V 2 0 4W SEMICOND DVC DI ZEN SI 82V 5 5W A LE SEMICOND DVC DI ZEN SI 25V 52 1W A31A DIODE ZENER 30V 22 0 4W 1N9 2C D0 35 OR 7 SEMICOND DVC DI BI DIR TRANSIENT SUPPR SI SEMICOND DVC DI ZEN S1 150V 52 0 4W D0 7 gt 180V 5 0 4W 1N991B D0 35 OR 180V 52 0 4W 1N991B8 D0 35 OR SEMICOND DVC DI ZEN SI 3 0 V 2 ASSY SP ELEC 10 24 AWG 0 50 L RIBBON L RIBBON L RIBBON L RIBBON D DIODE ZENER DIODE ZENER ASSY SP ELEC 10 24 AWG 0 50 ASSY SP ELEC 10 24 AWG 0 50 ASSY SP ELEC 10 24 AWG 0 50 BRAID ASSY WIRE 7 0 L BUS CONDUCTOR DUMMY RES 0 094 0 CIRCUIT BD ASSY TRIGGER CIRCUIT BD ASSY TRIGGER CAP FXD CER DI 0 047UF 80 20 50V CAP FXD CER DI 0 047UF 80 20 50V CAP FXD CER DI 0 047UF 80 20 50V CAP FXD CER DI 0 047UF 80 20 50V CAP FXD CER DI 200 5 100 CAP FXD CER DI 0 047UF 80 20 50V CAP FXD CER D1 0 047UF 80 201 50V DI 0 047UF 80 20 50V CAP FXD CER DI 0 047UF
233. OLL AREA 2 33XX HSCROLL AREA 3 34XX RVIDEO AREA 4 35 HIGHLIGHT AREA 5 36XX WAVEFORM AREA 6 8 49 Troubleshooting and Repair 1241 Addendum 92 B2ES Y29019 WY Aejdsiq 2 8 aanbid 1u 0118 0 00 O 1eSI3WVNON 2000HQQY dYHMH 1000800vY 31A48H Sec sein 110825 H31SYH x30Nt MOT Wagons 1N0 901 dot 4440 0000 Sez ny 4320 0000 5920 Seen d311vANB03 AY dSIQ 90 SON Soin Suijing ee e0 n Son Rm ay E 171108905 118H a m 100 OFGIA ONDINY 18 IISA HO1YH3N39 MISH nouo Hagorn 6 NETTE ANA u h i i 1 I I i NOUT INASI e 6 413809 een J momou Hou vues 09 HOSS32Oud H4 L WVHUOVIG 40018 AV1dSIG Troubleshooting and Repair 1241 Addendum suoneoo JusUOdWIOD pieog ZZ 8
234. OR 10H103 IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL GATE DUAL 2 WIDE 2 3 INPUT IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL GATE 4 WIDE IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL 4 WIDE IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL GATES TRIPLE 2 3 2 INPUT IC DIGITAL ECL GATES QUAD 2 INPUT OR 10102 MICROCKT DGTL HEX D MA SLAVE FF W RESET IC DIGITAL ECL BUFFER DRIVER HEX INVERTER IC DIGITAL ECL GATE 4 WIDE IC DIGITAL ECL GATE 4 WIDE IC DIGITAL ECL GATE 4 WIDE IC DIGITAL ECL 4 WIDE IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL GATES TRIPLE 2 3 2 INPUT IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL GATE TRIPLE 2 INPUT EXOR NOR IC DIGITAL ECL GATES QUAD 2 INPUT NOR IC DIGITAL ECL 4 WIDE IC DIGITAL ECL GATE DUAL 2 WIDE 2 3 INPUT IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL ECL FLIP FLOP DUAL D TYPE MASTER IC DIGITAL TRIPLE 2 INPUT EXOR NOR UNIT QTZ 12 0MHZ 0 0152 SER CIRCUIT BD ASSY 9 CHAN ACQ D1 ONLY 04713 04713 04713 01295 04713 04713 04713 04713 04713 0 263 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 01295 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 0
235. OR MSPO 168446 307 0587 00 RES NTWK FXD F1 7 68 OHM 20 0 125W 91637 CSCOBAO1 680 OR MSPO AL6R450 307 0587 00 RES NTWK FXD FI 7 68 OHM 20 0 125W 91637 CSCOBAD1 680 OR MSPO 16 501 315 0680 00 RES FXD FILM 68 OHM 5 0 25W 57668 68 5 0 25 AL6R503 315 0680 00 RES FXD FILM 68 OHM 5 0 25W 57668 68 5 0 25w AL6R504 307 0819 00 RES NTWK FXD FI 9 62 OHM 22 0 15W EACH 91637 MSP10A01 620G OR CSC AL6R505 307 0819 00 RES NTWK FXD FI 9 62 OHM 2 0 15W EACH 91637 MSP10A01 6206 OR CSC 6 512 307 0819 00 RES NTWK FXD FI 9 62 OHM 2 0 15W EACH 91637 MSP10A01 620G OR CSC AL6R517 307 0819 00 RES NTWK FXD FI 9 62 OHM 2 0 15W EACH 91637 MSP10A01 620G OR CSC 168519 307 0824 00 RES NTWK FXD FT 4 150 0 2 0 34 EACH 91637 MSPOBAO315IG 168520 307 0942 00 RES NTWK FXD F1 2 330 220 25 91637 CSCO4A03 3316 A16R521 307 0943 00 RES NTWK FXD F1 2 510 22 0 25 91637 CSCO4A03 511G 6 522 315 0151 00 RES FXD FILM 150 OHM 5 0 25W 57668 150 5 0 25w 4168523 315 0511 00 RES FXD FILM 510 OHM 5 0 25W 19701 510 5 0 25w 9 36 REV JAN 90 168523 Al6R524 16 529 AJ6R530 Al6R532 16 533 Al6R535 Al6R537 Al6R540 6 544 6 546 AL6R547 AL6R550 Al6R551 Al6R555 Al6R564 Al6R565 168566 16 257 16 268 A16U105 160108 Al6U111 Al6U116 AI6U119 Al6U122 Al6U124 Al6U127 A16U134 AL6U137 A16U140 Al6U153 Al6U153 Al6U154 A16U154 Al6U156 A16U203 160207 160211 Al
236. OTCRO5A 152 0655 00 SEMICOND DVC DI RECT SI 100V 3A 03508 Al15AX39 A07CR255 152 0398 00 DIODE RECT FAST RCVRY 200V 1A 200NS 1N4935 04713 1N4935 AOTCR262 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 184152 AO CR266 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1N4152 AO7CR267 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1N4152 AQTCR271 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1N4152 A07CR276 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1N4152 07 281 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1N4152 A07CR282 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1N4152 A07CR285 152 0333 00 SEMICOND DVC DI W SI 55V 200MA DO 35 07263 FDH 6012 A07CR341 152 0398 00 DIODE RECT FAST RCVRY 200V 1A 200NS 1N4935 04713 1N4935 AOTCR342 152 0398 00 RCVRY 200V 1A 200NS 1N4935 04713 164935 7 72 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1 152 A07CR381 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 1N4152 AO7CR382 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 07263 164152 A7CR411 152 0066 00 SEMICOND DVC DI RECT SI 400V 1A D0 41 05828 GP10G 020 2 152 0655 00 SEMICOND DVC DI RECT SI 100V 3A 03508 115 39 A07CR424 152 0655 00 SEMICOND DVC DI RECT SI 100V 3A 03508 115 39 AO7CRA31 152 0066 00 SEMICOND DVC DI RECT SI 400V 1A D0 41 05828 106 020 07 8445
237. OX 760 MINERAL WELLS TX 76067 0760 20932 KYOCERA INTERNATIONAL INC 11620 SORRENTO VALLEY RD SAN DIEGO CA 92121 22526 PONT E I DE NEMOURS AND CO INC 515 FISHING CREEK RD NEW CUMBERLAND PA 17070 3007 2546 CORNING GLASS WORKS 550 HIGH ST BRADFORD PA 16701 3737 27012 MICRO DEVICES CORP 1320 S MAIN ST MANSFIELD 44907 2516 SUB OF EMERSON ELECTRIC CO PO BOX 3538 27014 NATIONAL SEMICONDUCTOR CORP 2900 SEMICONDUCTOR DR SANTA CLARA CA 95051 0606 7264 MOLEX INC 2222 WELLINGTON COURT LISLE IL 60532 1613 31433 ELECTRONICS CORP PO BOX 5928 GREENVILLE SC 29606 31781 INC 20 RAILSIDE RD DON MILLS ONT CAN M3A 1M 31918 SCHADOW INC 8081 WALLACE RD EDEN PRAIRIE MN 55344 2224 30159 WEST CAP ARIZONA 2201 E ELVIRA ROAD TUCSON AZ 85706 7026 39293 INTERSIL INC 10600 RIDGEVIEW COURT CUPERTINO CA 95014 0704 32997 BOURNS INC 1200 COLUMBIA AVE RIVERSIDE CA 92507 2114 33096 COLORADO CRYSTAL CORP 2303 W 8TH ST LOVELAND CO 80537 5268 31333 SILICON GENERAL INC 11651 MONARCH ST GARDEN GROVE CA 92641 1816 9 2 REV JAN 90 Replaceable Electrical Parts 1241 Addendum CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Bada Manufacturer Address City State Zip Code 3335 ADVANCED MICRO DEVICES 901 THOMPSON PL SUNNYVALE CA 94086 4518 34649 INTEL CORP 3065 BOWERS AVE SANTA CLARA CA 95051 5434 HEWLETT PACKARD CO 3 0 W TRIMBLE RD SAN JOSE CA 95131 50579 SIEMENS COMPONENTS INC 19000 HOMESTEAD RD CUPERTINO CA 95014 0712 54422 NORTHWEST TE
238. PIN SPRING 0 25 X 0 103 OD STL CD PL TKO858 ORDER BY DESCRIPTION 31 136 0751 00 3 SKT PL IN ELEK DIP 24 PIN 2 X 12 0 6 X 0 09922 DILB24P108 32 131 2567 00 1 CONN RCPT ELEC CKT BD RTANG 17 34 CONT 22526 6546 006 33 131 0608 00 54 TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD 22526 48283 0 34 131 0608 00 5 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD 22526 48283 0 010 6460 01 1 PROBE DATA 6460 80009 010 6460 01 SEE 070 4345 00 MANUAL FOR PARTS BRKDN 1200 02 GPIB COMM PACK 35 380 0343 09 1 HSG HALF PK INNER 5 80009 380 0343 09 ATTACHING PARTS 36 211 0102 00 4 SCREW MACHINE 4 40 X 0 5 FLH 100 DEG STL 93907 ORDER BY DESCRIPTION END ATTACHING PARTS 3 367 0328 00 1 ANDLE BOW 2 9 1 55 80009 367 0328 00 38 670 7697 01 020170 8021276 1 CIRCUIT BD ASSY GPIB 80009 670 7697 01 670 7697 02 021277 21374 1 CIRCUIT BD ASSY GPIB 80009 670 7697 02 6 0 7697 03 021375 1 CIRCUIT BD ASSY GPIB 80009 670 7697 03 39 136 0755 00 1 SKT PL IN ELEK MICROCIRCUIT 28 DIP 09922 DILB28P 108 40 386 4972 00 1 PLATE MOUNTING GPIB 80009 386 4972 00 41 131 2895 00 1 CONN BD RTANG 24 CONTACT 02660 57 92248 12 42 214 2871 00 1 HARDWARE KIT STANDOFF STUD MOUNT W NUT 650 552633 3 43 131 0099 00 1 CONTACT ELEC PHOSPHOR BRONZE CU SN ZN 80009 131 0099 00 44 334 4879 00 8010100 8020499 1 MARKER IDENT 80009 334 48 9 00 334 4879 01 8020500 1 MARKER IDENT 80009 334 4879 01 45
239. R SCRN 01295 17415283 120195 156 0989 02 DIGITAL LSTTL SHIFT REGISTER 4X4 01295 7415670 121198 156 0784 02 IC DIGITAL LSTTL COUNTER SYNCH 4 BIT BINARY 01295 SN 4LS163AN 1201200 156 0331 03 IC DIGITAL STTL FLIP FLOP DUAL 0 74574 01295 SN74S74NP3 Al2U205 156 0382 02 IC DIGITAL LSTTL GATES QUAD 2 INPUT NAND 01295 741500 AL2U208 156 0385 02 8010100 8011626 1IC DIGITAL LSTTL CATES HEX 741504 01295 SN A4LSO4NG Al2U208 156 1722 00 011627 IC DIGITAL FTTL GATES HEX INV 74F04 DIP14 3 04713 74 A120210 156 0480 02 IC DIGITAL LSTTL GATES QUAD 2 INPUT AND 01295 74158 Al2U220 156 1998 00 IC DIGITAL ALSTTL FLIP FLOP OCTAL D TYPE 01295 74 15273 Al2U225 156 0865 02 IC DIGITAL LSTTL FLIP FLOP OCTAL D TYPE 012905 7415273 120230 160 3558 00 MICROCKT DGTL STTL OCTAL 16 IN AOI GATE 80009 160 3558 00 A12U235 160 3558 00 MICROCKT DGTL STTL OCTAL 16 IN AOI GATE 80009 160 3558 00 Al2U240 156 0865 02 IC DIGITAL LSTTL FLIP FLOP OCTAL D TYPE 01295 7415273 Al2U245 156 2012 00 10100 8012878 IC MEMORY NMOS SRAM 2K X 8 120NS DIP28 6 61772 6116 120 Al2U245 156 1594 00 8012879 IC MEMORY NMOS SRAM 2K X 8 15085 DIP24 6 61772 IDT6116SA45P Al2U255 156 0956 02 IC DIGITAL LSTTL BUFFER NONINV OCTAL LINE 01295 5741524403 Al2U260 156 0530 02 IC DIGITAL LSTTL MUX QUAD 2 TO 1 DATA 01295 SN74LS157N3 Al2U265 156 0707 03 IC DIGITAL STTL GATES QUAD 2 INPUT XOR GATE 01295 SN74S86 NP3 OR JP4 120270 156 0321 02 IC DIGITAL STTL
240. R BY DESCRIPTION END ATTACHING PARTS 59 367 0328 00 1 HANDLE BOW 2 9 L SST 80009 367 0328 00 60 670 696 00 1 CIRCUIT BD ASSY RS232 80009 670 7696 00 61 136 0755 00 1 SKT PL IN ELEK MICROCIRCUIT 28 DIP 09922 DILBZ28P 108 62 386 4972 01 1 MOUNTING RS232 80009 386 4972 01 63 131 2897 00 1 CONN RCPT ELEC D SUBMINIATURE 25 00779 747023 1 64 131 0890 00 2 LOCK CONNECTOR 4 40 X 0 312 L HEX HD STL 71468 D20418 2 65 131 0099 00 1 CONTACT ELEC PHOSPHOR BRONZE CU SN ZN 80009 131 0099 00 66 334 4877 00 1 MARKER IDENT 80009 334 4877 00 6 380 0384 03 1 HSG HALF ROM PK LID ABS 80009 380 0384 03 11 12 REV JAN 1990 Fig amp Index Tektronix Serial Number Replaceable Mechanical Parts 1241 Addendum Mfr No Part Number Effect Discont Qty 12345 Part Name amp Description Code Mfr Part Number 5 1 200 2780 00 2 016 0707 00 3 161 0104 00 4 161 0104 06 9 161 0104 07 6 161 0104 05 7 161 0104 08 8 161 0154 00 9 012 0556 00 062 6926 00 070 4340 01 070 4641 01 010 6101 11 010 6105 11 012 0630 01 012 0630 04 012 0815 00 012 0991 00 012 0997 00 062 6927 00 062 7470 00 067 1103 02 REV JAN 1990 Qm N pd 4 de pad STANDARD ACCESSORIES COVER FRONT PNL CASE CARRY ING MANUALS CABLE ASSY PWR 3 WIRE 98 0 L W RTANG CONN STANDARD ONLY CABLE ASSY PWR 3 X 0 75MM S0 220 98 0 L OPTION Al EUROPEAN CABLE ASSY PWR 3 X
241. R429 315 0332 00 RES FXD FILM 3 3K 0HM 52 0 25W 57668 3300 5 0 25w ALOR430 321 0334 00 RES FXD FILM 29 4K OHM 12 0 125W TC TO 91637 CMF55116G29401F ALOR432 321 0363 00 RES FXD FILM 59 0K 0HM 12 0 1254 TC TO 91637 CMF55116G59001F ALOR435 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 52 0 25w ALOR436 32 0293 00 RES FXD FILM 11 0K 0HM 12 0 1254 TC TO 91637 CMF55116611001F 108437 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 5 668 100 5 0 25w ALOR480 315 0202 00 RES FXD FILM 2K 5 0 25 57668 2000 5 0 25w ALOR495 315 0101 00 RES FXD FILM 100 5 0 25 57668 100 5 0 25w ALOR520 315 0102 00 RES FXD FILM 1K OHM 5 0 25W 57668 1000 5 0 25w ALOR522 315 0102 00 FILM 1K 5 0 25 57668 1000 5 0 25w ALOR545 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 52 0 25w ALOR575 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 57668 100 5 0 25w ALOR650 315 0563 00 RES FXD FILM 56K 5 0 25 19701 56K 5 0 25w ALOR652 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w ALOR655 315 0563 00 RES FXD FILM 56K 0HM 52 0 25W 19701 56K 5 0 25w 160 3072 00 MICROCKT DGTL NMOS 8192 X 8 EPROM W THREE 80009 160 3072 00 ALQUI65 160 3073 00 DGTL NMOS 8192 X 8 EPROM W THREE 80009 160 3073 00 A10U170 160 3074 00 MICROCKT DGIL NMOS 8192 X 8 EPROM W THREE 80009 160 3074 00 160 3075 00 MICROCKT DGTL NMOS 8192 X 8 EPROM W THREE 80009 160 3075 00 ALQU185 160 30 6 00 MICROCKT
242. ROL LOOP DISTORTED CHECK HORIZONTAL PROCESSOR NO VERT POGES CHECK VERTICAL PROCESSOR DISTORTED TROUBLESHOOT FEEDBACK CONTROL LOOP NO SINGLE OR OR TROUBLESHOOT HORIZONTAL SWEEP CIRCUIT OR HORIZ ROLLING NO SINGLE YES POR VERTS TROUBLESHOOT VERTICAL SWEEP CIRCUIT ROLLING NO POOR YES TROUBLESHOOT COLOR SHUTTER DRIVER 5378 64 Figure 8 2 1241 CRT Drive Board troubleshooting tree 8 11 Troubleshooting and Repair 1241 Addendum NOTE NO DISPLAY ARE ALL POWER SUPPLIES OK NO TROUBLESHOOT POWER SUPPLY YES PROBE GROUND MUST BE CONNECTED TO IS TP224 WHEN CHECKING TP430 VOLTAGE NO AT TP430 BETWEEN 0 5V AND 0 5V 8 12 YES CHECK CATHODE Z AXIS AMPLIFIER JUMPER PINS 2 AND 3 ON A12J429 LOCATED ON THE DISPLAY BOARD AND COMPARE WAVE FORM AT TP650 TO FIG 8 9 15 4548 PIN 6 500 4 YES NO SUSPECT CR521 R541 R533 VR530 VR531 VR533 PROBLEM WITH HORIZONTAL EDGES CHECK U218 COMPARE INPUTS TO FIGS 5 7 amp 5 8 IF OK CONTINUE Figure 8 2 1241 CRT Drive Board troubleshooting tree cont SUSPECT U241 IF OK CONTINUE PROBLEM WITH VERTICAL EDGES LIFT ANODE OF CR337 IS THERE 350V HORIZONTAL FLYBACK PULSE ON TP456 NO 15 SUSPECT YES F468 BLOWN VR336 0334 NO IS THERE 1
243. RRACE 3 BEAVERTON OR 97006 75915 LITTELFUSE INC 800 E NORTHWEST HWY DES PLAINES IL 60016 3049 UW MILLER DIV PO BOX 5825 76493 BELL INDUSTRIES INC 19070 REYES AVE COMPTON CA 90224 5825 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077 0001 81483 INTERNATIONAL RECTIFIER 9220 SUNSET BLVD LOS ANGELES CA 90069 3501 82389 SWITCHCRAFT INC 5555 N ELSTRON AVE CHICAGO IL 60630 1314 83003 VARO INC 2203 W WALNUT ST GARLAND TX 75042 84411 AMERICAN SHIZUKI CORP 301 WEST 0 ST NE 69153 1844 91637 DALE ELECTRONICS INC 2064 12TH AVE COLUMBUS NE 68601 3632 213 TOPTRON CORP TOKYO JAPAN 515 EVOX RIFA INC 100 TRI STATE INTERNATIONAL LINCOLNSHIRE IL 60015 858 STAUFFER SUPPLY CO DIST 810 SE SHERMAN PORTLAND OR 97214 TK0900 UNITED CHEMI CON INC 9801 W HIGGINS ROSEMONT IL 60018 4704 TK1016 TOSHIBA AMERICA INC 2692 DOW AVE TUSTIN CA 92680 TK1345 ZMAN AND ASSOCIATES 7633 S 180TH KENT WA 98032 1 1375 ESAM BOX 376 GRANTS PASS OR 97526 TK1386 PYRAMID ELECTRONICS SUPPLY INC 9757 JUANITA DRIVE NE KIRKLAND WA 98034 TK1456 PAPST MECHATRONIC CORP AQUIDNECK INDUSTRIAL PK NEWPORT RI 02840 483 PRODUCTS INC 45 SALEM ST PROVIDENCE RI 02907 1 2156 ACACIA DEANCO 7763 SW CIRRUS RD BEAVERTON OR 97005 6452 TK2209 MICRON TECHNOLOGY INC 2805 COLUMBIA RD BOISE ID 83706 REV JAN 90 9 3 Replaceable Electrical Parts 1241 Addendum Tektronix Serial Number Mfr Component No Part Number Effect Discont Part Name amp De
244. RROR INFORMATION 8 30 Diagnostics Overview 6 30 Error Index Overview 8 31 I O PROCESSOR KERNEL LED ERROR INDEXES 8 33 PowerUp Stage 0 22 xew e EX Puyaqa Ga ul 8 38 RAM Stager Sensit aig st eh ae i D ert yd 8 41 ROM arte 8 43 COMM Stage 8 48 3XXX DISPLAY ERROR INDEXES 8 49 JIXX RAM AHEA T 555 23 5 RE EL 8 52 32XX VERTICAL SCROLLING AREA 2 8 56 33XX HORIZONTAL SCROLLING AREA 8 59 34XX REVERSE VIDEO AREA 4 8 64 3oXX HIGHLIGHTING AREA 5 8 66 36XX WAVEFORM GENERATION AREA 6 8 69 Section 8 1241 Service Addendum TROUBLESHOOTING AND REPAIR OVERVIEW This section contains procedures a technician should use to troubleshoot and repair a faulty 1241 Logic Analyzer Only troubleshooting information that is unique to the 1241 is covered in this addendum For failures not discussed in this section refer to the 1240 1241 Logic Analyzer Service Manual Depending on the conditions of the failure various troubleshooting strategies may be used to locate the specific problem Table 8 1 lists categories of fault conditions and related troubleshoot ing information sources that should be used to
245. S 1483 126 175 9256 01 4 ASSY SP ELEC 10 22 AWG 10 0 L RIBBON 54422 127 131 2570 01 8 05574 11 10 CONN RCPT ELEC CKT 50 100 CONT FEMALE 000264 0058 REV JAN 1990 DL I 2 bus M oC we 7 1241 Service 1241 Service Replaceable Mechanical Parts 1241 Addendum Fig amp index Tektronix Serial Number Mfr No Part Number Effect Discont Qty 12345 Part Name amp Description Code Mfr Part Number 4 067 1103 03 1 FIXTURE CAL 80009 06 1103 03 1 670 8567 00 1 CIRCUIT ASSY ACQUISITION EXTENDER 80009 670 8567 00 2 386 4950 00 1 STIF CIROUIT 80 10 025 L BRASS 80009 386 4950 00 3 351 0058 00 1 SLIDE QUIDE PLUG IN 80009 351 0058 00 4 131 2401 00 3 CONN RCPT ELEC 2 X 25 MALE TK1483 082 2543 5010 5 131 1263 00 1 CONN RCPT ELEC EDGECARD 50 100 CONT O 1 S 05574 600201 3208 6 131 0993 00 4 BUS CONDUCTOR SHUNT ASSEMBLY BLACK 22526 65474 006 7 131 0608 00 21 TERMINAL PIN 0 365 X 0 025 BRZ GOLD 22526 48783 036 8 012 0556 00 2 LEAD SET ELEC DIAGNOSTIC 2156 61500 9 670 7539 02 1 CIROJIT ASSY MAIN EXTENDER 80009 670 7539 02 10 386 4950 00 1 OT IF CIRQUIT BD 10 025 L BRASS 80009 386 4950 00 11 351 0058 00 1 SLIDE GUIDE PLUG IN 80009 351 0058 00 12 131 1263 00 1 CONN RCPT ELEC EDGECARD 50 100
246. Standard Institute 1430 Broadway New York New York 10018 Component Values Electrical components shown on the diagrams are in the following units unless noted otherwise Capacitors Values one or greater are in picofarads pF Values less than one are in microfarads uF Resistors Ohms 0 The information and special symbols below may appear in this manual Assembly Numbers and Grid Coordinates Each assembly in the instrument is assigned an assembly number e g A20 The assembly number appears on the circuit board outline on the diagram in the title for the circuit board component location illustration and in the lookup table for the schematic diagram and corresponding component locator illustration The Replaceable Parts list is arranged by assemblies in numerical sequence the components are list ed by component number 5 following illustration for constructing a component number Function Block Title Internal m Screwdriver Adjustment Cam Switch Closure Chart _ _ Dot indicates Switch closure Etched Circuit Board Outlined in Black Refer to Waveform Function Block _ _ Outline IC type ts T Heat Sink toh P O Part of circuit board we Assembly Num ber ui Tektronix Part No for circuit boards Component Number A23 2 R1234 ENE n Number pt used Chassis mounted components have Assembly
247. TICS ACQUISITION USER S CHOICES ACQUISITION PROBES TRIGGER BOARD DISPLAY mos ee ACQUISITION CLOCKS INPUT OUTPUT COMM EVENT PROCESSOR gt RECOGNITION BOARD PACKS TEST PATTERN CLOCK QUALIFIER GENERATOR DIAGNOSTICS INFORMATION DUAL DISPLAY OUTPUTS USER S PAIS CHOICE SUPPLY OUTPUTS TO ALL CIRCUITS DISPLAY MONITOR DISPLAY BD KEYBOARD Trigger Board Generates CRT DRIVE BD SOFT KEYS Sequence Leve Pointers that Specify the Event CRT Level Being Accessed SHUTTER Figure 4 1 1241 system block diagram OVERVIEW 1241 is a menu driven logic analyzer The menus are displayed a monitor screen and ac cessible from the keyboard Selections made in the menus control the 1241 during data acquisi tions triggering and data display The Control Processor I O Processor Boards are the main controllers for all instrument operations The I O Processor Board accepts the keyboard and on screen soft key information and passes these user menu choices to the Control Processor The Control Processor sends these instructions to the Trigger Board and Acquisition Boards specifying the configuration and conditions surrounding the data acquisition When conditions are met the data is stored and the Control Processor performs any necessary data manipulation Data that is ready for display is read by the I O Processor and passed to the Display Board The Display Board generat
248. TIONS Description 12 7 kg 28 0 Ibs See also Figure 2 3 19 7 cm 7 8 inches 36 8 cm 14 5 inches 49 8 cm 19 6 inches 57 6 cm 22 7 inches Specifications 1241 Addendum 18 75 in 47 6 cm 4342 08 Figure 2 3 1241 dimensions 2 15 OPERATING SECTION INFORMATION SECTION 3 OPERATING INFORMATION POWER REQUIREMENTS 3 1 gcc c 3 2 1241 POWER SWITCHES 3 2 POWER UP DIAGNOSTICS 3 2 Section 3 1241 Service Addendum OPERATING INFORMATION INTRODUCTION With the exception of the vertical expand feature operation of the 1241 Logic Analyzer is identical to that of the 1240 When the vertical expand field is set to 2 the height of the timing traces is dou bled To make room for the expanded display the soft keys and some select and information fields are removed from the screen Restoring the vertical expand field to 1 returns the timing traces to their original height and replaces the soft keys on the screen Refer to the 1240 1241 Operator s Manual or to the 1240 1241 Service Manual for operating information POWER REQUIREMENTS The 1241 Logic Analyzer operates from a nominal 115 or 230 V 48 to 63 Hz single phase power source Before connecting the mainframe to a power source verify that the LINE SELECTOR on the mainframe s rear panel shows the correct nomina voltage for the power source b
249. TRIGGER ADJUST Figure 5 5 Expanded view of the CRT Drive Board shows components used in the External Trigger Adjust Equipment Required digital multimeter adjustment tool Adjustment Procedure Access the CRT module by removing the CRT Drive Board bracket Refer to the Disassembly And Installation Procedures section in this addendum for specific removal procedures Set the DMM to the 200 mV range Connect the DMM high lead to TP178 and the low lead to TP270 GND Refer to Figure 5 5 Adjust R179 for a reading of 0 000 V 2 mV DISASSEMBLY 6 AND INSTALLATION SECTION PROCEDURES SECTION 6 DISASSEMBLY AND INSTALLATION PROCEDURES OVERVIEW pis Ear v Eo 6 1 GENERAL DISASSEMBLY INSTALLATION PRECAUTIONS 6 2 TOOLS REQUIRED 6 2 PROCEDURE 7 LED PHOTOTRANSISTOR BOARDS 6 3 Disassembly utc due e oE tre e ede au E dire A 6 3 PROCEDURE 8 1241 CRT DRIVE BOARD REMOVAL 6 3 Disdassembly secda vas IER EUER aire ra adi ede e og edo e aeos 6 3 Iristallati n HANNS ue e eara cha en 6 4 PROCEDURE 9 1241 CRT amp COLOR SHUTTER REMOVAL 6 5 B rzcce MCCC m 6 5 Installation Hints aba EE E bL 6 5 Section 6 1241 Service Addendum DISASSEMBLY AND INSTALLATION PROCEDURES OVERVIEW The disassembly installation procedures given in this section are replace
250. TS 60 211 0512 00 2 SCREW MACHINE 6 32 X 0 5 FLH 100 DEG STL TKO435 ORDER BY DESCRIPTION ATTACHING PARTS 61 342 0458 00 1 INSULATOR PLATE TRANSISTOR MICA 08530 ADVISE 62 342 0449 01 1 INSULATOR PLATE TRANSISTOR ALUMINA 80009 342 0449 01 63 131 0589 00 48 TERMINAL PIN 0 46 L X 0 025 SQ BRZ GLD 22526 48283 09 5 COIL XFMR SEE A07L151 L351 1445 L451 261 REPL ATTACHING PARTS 65 211 0020 00 4 SCREW MACHINE 4 40 X 1 125 PNH STL TKO435 ORDER BY DESCRIPTION 66 211 0021 00 1 SCREW MACHINE 4 40 X 1 25 PNH STL TKO435 ORDER BY DESCRIPTION 6 352 0725 00 8 HOLDER TOROID PLASTIC 80009 352 0725 00 68 210 0586 00 5 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 211 041800 00 END ATTACHING PARTS 69 214 0579 00 13 TERM TEST POINT BRS CD PL 858 ORDER BY DESCRIPTION 70 352 0086 00 1 HOLDER TOROID 0 5 DIA DELRIN 80009 352 0086 00 71 131 0993 00 1 BUS CONDUCTOR SHUNT ASSEMBLY BLACK 22526 65474 006 72 308 0161 00 1 RES FXD WW 3 0HM 52 8W 91637 HL 12 022 8 ATTACHING PARTS 73 211 0529 00 1 SCREW MACHINE 6 32 X 1 250 PNH STL 93907 ORDER BY DESCRIPTION 74 211 0658 00 1 SCR ASSEM WSHR 6 32 X 0 312 PNH STL P07 78189 551 060545 0 75 210 0601 00 1 EYELET METALLIC 0 183 OD X 0 192 L BRASS 18680 77362 76 210 0478 00 1 SPACER POST 0 66 W 6 32 THD THRU AL HEX TK2278 ORDER BY DESCRIPTION END ATTACHING PARTS 77 253 0135 01 PLASTIC STRIP VINYL 0 062 X 0 5 X 8
251. TWK FXD FI 10K 20 9 5 91637 MSP10A01 103M OR G A09R459 307 0446 00 RES NIWK FXD FI 10K OHM 202 9 RES 91637 MSP10A01 103M OR AG9R461 30 1137 00 RES NIWK FXD F1 8 0 005 OHM 150 502 0 125W 00779 435704 8 AD9R467 315 0103 00 RES FXD FILM 10K 0HM 52 0 25W 19701 10K 5 0 25w A9TP117 131 0608 00 TERMINAL PIN 0 365 X 0 025 PH BRZ GOLD PL 22526 48283 036 A090105 160 3079 00 MICROCKT DGTL NMOS 16384 X 8 EPROM W 3 80009 160 3079 00 109110 160 3080 00 MICROCKT DGTL NMOS 16384 X 8 EPROM W 3 80009 160 3080 00 9 115 160 3081 00 MICROCKT DGTL NMOS 16384 X 8 EPROM W 3 80009 160 3081 00 109120 160 3082 00 MICROCKT DGTL NMOS 16384 X 8 EPROM W 3 80009 160 3082 00 A09U125 160 3342 00 MICROCKT DGTL NMOS 16138 X 8 EPROM W THREE 80009 160 3342 00 4090130 160 3343 00 MICROCKT DGTL NMOS 16138 X 8 EPROM W THREE 80009 160 3343 00 4090135 160 1581 04 MICROCKT DGTL 16384 X 8 EPROM PRGM 80009 160 1581 04 4090140 156 1225 01 LINEAR DUAL COMPARATOR SCREENED 01295 LM393P3 AQ9U156 156 0956 02 IC DIGITAL LSTTL BUFFER NONINV OCTAL LINE 01295 SN74LS244N3 4090160 156 0956 02 IC DIGITAL LSTTL BUFFER NONINV OCTAL LINE 01295 SN74LS244N3 A09U164 156 0422 02 IC DIGITAL LSTTL COUNTER SYNCH 4 BIT 01295 SN74LS191N3 AQ9U201 156 0530 02 IC DIGITAL LSTTL MJX QUAD 2 TO 1 DATA 01295 SN74LS15 13 ADU204 156 0956 02 IC DIGITAL LSTTL BUFFER NONINV OCTAL LINE 01295 SN74LS244N3 A09U207 156 0956 02 IC DIGITAL LSTTL BUFFER NONINV OCTAL
252. Tektronix COMMITTED TO EXCELLENCE 1241 LOGIC ANALYZER SERVICE MANUAL ADDENDUM TO THE 1240 1241 LOGIC ANALYZER SERVICE MANUAL This addendum contains service information for the 1241 Logic Analyzer It is designed to be used with the 1240 1241 Logic Analyzer Service Manual packaged as 062 7124 02 and contains only information that pertains exclusively to 1241 instruments Most of the information in the 1240 1241 Logic Analyzer Service Manual applies to both types of instruments The major differences between the 1240 and the 1241 are in the Display and CRT Drive circuits How To Use This Addendum This addendum is designed similarly to the 1240 1241 Logic Analyzer Service Manual Information within the addendum corresponds to sections in the service manual You can place the addendum at the back of the service manual or you can insert the pages into the corresponding ser vice manual sections WARNING The following servicing instructions are for use by qualified service personnel only To avoid personal injury do not perform any servicing other than that contained in the operating instruc tions unless you are qualified to do so PLEASE CHECK FOR CHANGE INFORMATION AT THE REAR OF THIS MANUAL 070 5378 00 FIRST PRINTING JULY 1985 PRODUCT GROUP 5E REVISED PRINTING JANUARY 1990 Copyright 1985 1990 Tektronix Inc All rights reserved Contents of this publication may not be reproduced in any form without the writte
253. Timer Adjust 5 16 6 CRT Drive Board External Trigger Adjust 5 18 Section 5 1241 Service Addendum VERIFICATION AND ADJUSTMENT PROCEDURES INTRODUCTION There are three types of verification and adjustment procedures Functional Check Procedures Performance Verification Procedures and Adjustment Procedures These procedures along with the setup information supplied in the beginning of this section should allow a qualified technician to adjust and verify proper operation for any configuration of the 1241 Many of the verification and adjustment procedures apply to both 1240 and 1241 instruments Only those procedures that are different for the 1241 are given in this section They are numbered the same as the corresponding 1240 procedure that they replace Refer to the 1240 1241 Service Manual for procedures that are common to both instruments Functional Check Procedures These procedures may be used as a form of incoming inspection to verify that the instrument is operational They are identical for both 1240 and 1241 instruments Refer to the 1240 1241 Logic Analyzer Service Manual Performance Verification Procedures These procedures verify all the specifications listed in the performance requirements column of the Specifications section They should be performed by a service technician for a detailed check of the product characteristics These checks may be extensive and time consuming Under
254. UAD 2 INPUT OR 74S32 01295 587452283 A120108 156 0480 02 IC DIGITAL LSTTL GATES QUAD 2 INPUT AND 01295 74158 A12U110 156 0479 02 IC DIGITAL LSTTL GATES QUAD 2 INPUT OR 01295 5 741932 20115 156 0479 02 IC DIGITAL LSTTL GATES QUAD 2 INPUT OR 01295 SN ALS32IG Al2U120 156 0530 02 IC DIGITAL LSTTL MJX QUAD 2 TO 1 DATA 01295 SN74LS157N3 A120125 156 0865 02 IC DIGITAL LSTTL FLIP FLOP OCTAL D TYPE 01295 7415273 A12U130 160 30 8 00 8010100 010717 MICROCKT DGTL 80009 160 3078 00 A12U130 160 3078 01 8010718 MICROCKT DGTL NMOS 4K X 8 EPROM W 3 STATE 80009 160 3078 01 Al2U140 156 0865 02 C DIGITAL LSTTL FLIP FLOP OCTAL D TYPE 01295 7415273 Al2U145 156 2012 00 B010100 8012878 IC MEMORY NMOS SRAM 2K X 8 120NS DIP28 6 61772 6116 120 A12U145 156 1594 00 012879 IC MEMORY NOS SRAM 2K X 8 150NS DIP24 6 61772 IDT6116SA45P A12U155 156 0982 03 10100 010483 IC DIGITAL LSTTL FLIP FLOP OCTAL D TYPE 01295 7415374 120155 156 1704 00 010484 IC DIGITAL FTTL FLIP FLOP OCTAL D TYPE 04713 74F 374 A12U160 156 0530 02 IC DIGITAL LSTTL MUX QUAD 2 TO 1 DATA 01295 SN74LS15 N3 A12U165 156 0530 02 IC DIGITAL LSTTL MJX QUAD 2 TO 1 DATA 01295 54741515783 A12U170 156 0459 02 IC DIGITAL STTL GATES QUAD 2 INPUT AND 01295 7458 Al2U175 160 3077 00 DGTL HMOS 8K X 8 EPROM 80009 160 3077 00 Al2U185 156 0989 02 IC DIGITAL LSTTL SHIFT REGISTER 4X4 01295 7415670 Al2U190 156 0679 01 MICROCKT DGTL 4 BIT BINARY ADDE
255. USTRIES COMPTON CA 94539 04099 CAPCO INC 1328 WINTERS AVE GRAND JUNCTION CO 81502 DIV OF AVX CORP 0 BOX 867 04222 CERAMICS 19TH AVE SOUTH MYRTLE BEACH SC 29577 00426 ITW SWITCHES 6615 W IRVING PARK RD CHICAGO IL 60634 2410 4713 MOTOROLA INC 5005 E MCDOWELL RD PHOENIX AZ 85008 4229 6574 VIKING CONNECTORS INC 21001 NORDHOFF ST CHATSWORTH CA 91311 5911 6828 GENERAL INSTRUMENT CORP 600 W JOHN ST HICKSVILLE NY 11802 7263 FAIRCHILD SEMICONDUCTOR CORP 10400 RIDGEVIEW CT CUPERTINO CA 95014 9023 CORNELL DUBILIER ELECTRONICS 2652 DALRYMPLE ST SANFORD NC 27330 12697 CLAROSTAT MFG CO INC LOWER MASHINGTON ST DOVER NH 03820 12954 MICROSEMI CORP SCOTTSDALE 8700 E THOMAS RD SCOTTSDALE AZ 85252 12969 UNITRODE CORP 5 FORBES RD LEXINGTON MA 02173 7305 14099 SEMTECH CORP 652 MITCHELL ROAD NEWBURY PARK CA 91320 2211 14301 ANDERSON ELECTRONICS INC 310 PENN ST HOLLIDAYSBURG PA 16648 2009 1752 ELECTRO CUBE INC 1710 S DEL MAR AVE SAN GABRIEL CA 91776 3825 15454 2900 BLUE STAR STREET ANAHEIM CA 92806 2501 15818 TELEDYNE SEMICONDUCTOR 1300 TERRA BELLA AVE MOUNTAIN VIEW CA 94043 1836 17856 SILICONIX INC 2201 LAURELWOOD RD SANTA CLARA CA 95054 1516 18324 SICNETICS CORP 4130 5 MARKET COURT SACRAMENTO CA 95834 1222 18796 MURATA ERIE NORTH AMERICAN INC 1900 W COLLEGE AVE STATE COLLEGE PA 16801 2723 19396 ILLINOIS TOOL WORKS INC 1205 MCCONVILLE RD LYNCHBURG VA 24502 4535 PAKTRON DIV PO BOX 4539 19701 MEPCO CENTRALAB PO B
256. V 74S04 DIP14 3 01205 7454 A32U210 156 1415 00 10100 8020499 IC DIGITAL LSTTIL TRANSCEIVER OCTAL IEEE 488 01295 75161 A32U210 156 1415 01 8020500 MICROCKT DGTL OCTAL GPIB XCVR MANAGEMENT 27014 75161 A32U245 160 1916 01 MICROCKT DGTL 16384 X 8 EPROM PROGRAMMED 80009 160 1916 01 A32U310 156 1414 02 MICROCKT DGTL OCTAL GPIB BUS XCVR SCRN 27014 75160 A32U310 156 1414 01 B010100 8020499 IC DIGITAL TTL BUFFER OCTAL GPIB RECEIVER 01295 75160 A32U310 156 1414 02 020500 MICROCKT DGTL OCTAL GPIB BUS XCVR SCRN 27014 7516 Ml 670 7620 00 01010 013917 CIRCUIT BD ASSY 8K RAM PACK 80009 670 7620 00 12 501 ONLY OPTIONAL ACCESSORY 670 7620 01 8013918 CIROUIT BD ASSY 8K RAM PACK 80009 670 7620 01 12RS01 ONLY OPTIONAL ACCESSORY 10 146 0041 01 013918 BATTERY DRY 2 8 0 65AH LITHIUM 00681 3440DE OR B 600 MIBT115 146 0041 00 B010100 8013917 BATTERY DRY 2 8 0 65AH LITHIUM 00681 3440LP M1C114 281 0775 00 8010100 013917 CAP FXD CER DI 0 1UF 20 50V 0422 SA105E104MAA A11C128 290 0743 00 10100 013917 CAP FXD ELCTLT 100UF 50 20 164VDC 54477 ECE BI6V100L 41 210 290 0847 00 8013918 CAP FXD ELCTLT 47UF 50 20 1OWVDC 55680 1 4 0 2 A41C211 281 0775 00 8013918 DI 0 1UF 20 50V 04222 SA105E104MAA A1C214 281 0775 00 BO10100 8013917 CAP FXD CER DI 0 1UF 20 50 04222 SAIOBEIO4MAA A11C310 281 0775 00 B013918 CAP FXD CER DI 0 1UF 202 50V 04222 SALO5E104MAA M1CR115 152 0075 00 8010100 B01
257. W MISA MISH idx Ga x3 4 11 Theory of Operation 1241 Addendum 4 12 DISPLAY BOARD THEORY OVERVIEW The Display Board contains circuitry that performs the following functions positions characters and timing diagrams on the display screen controls vertical smooth scrolling controls horizontal smooth scrolling controls reverse video and highlighting for characters produces three intensified timing diagram cursors expands timing diagrams vertically The display circuitry produces three types of display screens basic text text and a state table with State table vertical scrolling and text and timing diagrams with timing diagram horizontal scrolling Figure 4 8 illustrates the relationship between 1241 s display memory and it s screen lines The display board theory of operation discussion is limited to display circuitry even though some trigger circuitry resides on the Display Board Trigger circuitry is discussed in Trigger Board Theory in the 1240 1241 Service Manual 64 CHARACTER SPACES 1 1 FIXED TEXT AREA eos VERTICAL AND HORIZONTAL VERTICAL SCROLLING AREA LINES 11 25 EXPAND FIXED TEXT AREA LINES 26 30 Figure 4 8 An example of 1241 display screen memory CLOCK DIVIDER lt gt 19 6 MHz crystal oscillator A12YG490 generates a basic clock frequency that is divided by a 4 bit counter A12U485 into the following Display Board cl
258. W RES FXD FILM 1K OHM 52 0 25W RES NTWK FXD 5 10K 0HM 52 0 125W RES FXD FILM 1K 54 0 25 BUS CONDUCTOR DUMMY RES 0 094 00 X 0 225 L RES NIWK FXD FI 7 10K OHM 2 0 15W EACH RES NTWK FXD FT 5 1K 0HM 102 0 7W RES FXD FILM 200 0HM 52 0 25M IC MEMORY CMOS SRAM 2K X 8 250NS DIP24 6 IC MEMORY CMOS SRAM 2K X 8 250NS DIP24 6 IC DGTL HCMOS GATE QUAD 2 INP XOR DIP14 3 IC MEMORY CMOS SRAM 2K X 8 250NS 01 24 6 IC MEMORY CMOS SRAM 32K X 8 150NS DIP28 6 IC MEMORY CMOS SRAM 2K X 8 250NS 01 24 6 IC MEMORY CMOS SRAM 32K X 8 150NS DIP28 6 SEMICOND DVC DI ZEN SI 3 6V 5 0 4W D0 7 SEMICOND DVC DI ZEN SI 3 6V 52 0 4W D0 7 CIRCUIT BD ASSY 32K ROM PACK 067 1103 03 128001 128511 128512 CAP FXD CER 01 0 20 50 CAP FXD CER DI 0 1UF 202 50V CHASSIS PARTS TUBEAXIAL 8 14 5VDC 6H 3200RPM 106CFM FUSE CARTRIDGE 7 250 MEDIUM BLOW STANDARD ONLY FUSE CARTRIDGE 3AG 4A 250V FAST BLOW OPTIONS 1 2 4 amp Ab ONLY RES VAR PNL 250 0HM O 5W SWITCH PUSH DPDT 4A 250VAC W BRACKET ENCODER DIGITAL INCREMENTAL 2 CHAN 50PPR CH MICROCKT DGTL NMOS 8192 X 8 EPROM 12RS12 ONLY IC MEMORY CMOS PROM 8K X 8 156 4003 00 12RD01 ONLY DGTL NMOS 8192 X 8 EPROM 12RS12 ONLY IC MEMORY CMOS PROM 8K X 8 156 4003 00 12RD01 ONLY NMOS 8192 X 8 EPROM 12851
259. XD FILM 15K 0HM 52 0 25W RES FXD FILM 330K OHM 5 0 25W RES FXD FILM 10K 0HM 52 0 25W RES FXD CMPSN 100 0HM 52 1W RES FXD WW 1 2K 0HM 12 3W TRANSFORMER PWR AUTO XFMR ASSEMBLY XFMR ASSEMBLY HIGH VOLTAGE TRANSFORMER RF WESSLE TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERM TEST POINT BRS CD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL TERMINAL 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 BRZ GOLD PL TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD PL IC DIGITAL CMOS BUFFER DUAL INVERTER 426 91637 75042 91637 5 668 91637 91637 57668 _ 51668 91637 01121 01121 9163 9
260. Y CONN RCPT ELEC BNC FEMALE CONN RCPT ELEC BNC FEMALE RES VAR NONWW PNL 250K 0HM O 5W NUT PLAIN HEX 0 25 32 X 0 312 BRS CD PL WASHER LOCK 0 261 ID INTL O 018 THK STL WASHER FLAT 0 25 ID X 0 5 OD X 0 063 AL END ATTACHING PARTS POT COVER CABLE ASSY SP ELEC 3 26 AWG 6 5L RIBBON FROM 13 TO R675 LEAD ELECTRICAL 26 AWG 5 5 L 2 M FROM 13 TO REAR PANEL BNC CABLE ASSY RF 50 OHM COAX 5 0 L FROM A13 REAR PANEL BNC CABLE ASSY RF 50 OHM 5 5 1 9 4 FROM 13 REAR PANEL BNC STRAP TIEDOWN E 0 091 W X 4 0 L BUTTON PLUG U W 0 375 HOLE SUBPANEL REAR ATTACHING PARTS SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL END ATTACHING PARTS Mfr 0435 80009 93907 93907 TK0435 93907 85471 01536 27238 93907 1456 78189 0435 9390 9390 16 78189 22670 24931 24931 12697 73743 78189 TK1148 TK1148 06383 72653 93907 ORDER BY DESCRIPTION 386 4831 02 ORDER BY DESCRIPTION 426 1901 01 ORDER BY DESCRIPTION ORDER BY DESCRIPTION 351 0697 00 ORDER BY DESCRIPTION ORDER BY DESCRIPTION 337 3095 00 821 01655 024 366 1264 00 ORDER BY DESCRIPTION 333 2919 01 407 2893 01 ORDER BY DESCRIPTION 4112 KX 211 041800 00 ORDER BY DESCRIPTION 352 0668 00 ORDER BY DESCRIPTION 214 3378 01 ORDER BY DESCRIPTION ORDER BY DESCRIPTION 211 041800 00 ORDER BY DESCRIPTION 441 1643 03 28JR364 1 28JR306 1 381 CM4025
261. al cleaning use iso propyl alcohol denatured ethyl alcohol or a solution of 1 mild detergent and 99 de ionized water Should the interior of the instrument require a thorough cleaning wash according to the following cautionary Cleaning Guidelines CLEANING GUIDELINES DO NOT wash the front or rear panel power switches The power switches must be covered during washing procedures Spray wash dirty parts with a cleaning solution listed under Interior Clean ing then use de ionized water to THOROUGHLY RINSE all parts IMMEDI ATELY DRY all parts with low air pressure When washing near unsealed electromechanical components use as little washing action as possible This prevents washing the lubricant out of the components and getting an excess of detergent into the contact areas of the switches DETERGENT RESIDUE WILL CAUSE CORROSION which may degrade instrument performance DO NOT immerse the front panel rotary encoder for cleaning purposes Because the shaft is lubricated clean it by only wiping it externally with a damp cloth DO NOT use a freon based cleaner for cleaning the circuit boards Freon will damage aluminum capacitors DO NOT use fluorocarbon based spray cleaners or silicon spray lubricants on switches or switch contacts These sprays may damage the circuit board material or plastic parts and leave a dust collecting residue If necessary Tektronix Contact Lubricant and Cleaner 006 0442 00 may be used as a lubri
262. and display functions are verified If all tests pass the Operation Level menu Config menu group is automatically displayed If diagnostics fail the Main Diagnostic menu is automatically displayed The menu lists the functional modules tested and a corresponding PASS FAIL message for each module Some error conditions only inhibit a portion of the 1241 functions Refer to the 7240 1241 Service Manual for a description of power up error conditions SECTION SECTION 4 THEORY OF OPERATION SECTION OVERVIEW LOGIC CONVENTIONS GENERAL SYSTEM DESCRIPTION Overview POWER SUPPLY BOARD THEORY CRT DRIVE BOARD THEORY Overview Vertical Sweep Circuit Horizontal Sweep Circuit THEORY OF OPERATION w n 9 B a n w a 9 n n RB a a n n U 0 m 6 n n o H 9 4 934 a a n n W u w w a n n 6 y 6 b 4 9 4 am 9 a m w n 4 w 9 w lt n m m a a 9 n h n k nn n n k n gt n y a 9 a A n o ou 9 lt lt 4 n n n n a p n n oH High Voltage Grid Voltage Generation Feedback Control
263. and time consuming Under normal circumstances the Part 2 Functionality Checks provide an adequate test of product performance in a less costly or time consuming manner ADJUSTMENT PROCEDURES INTRODUCTION The Adjustment Procedures provide instructions for adjusting instrument variables so that the instrument meets or exceeds the specifications listed in the performance requirements column of the Specifications section If the product cannot be made to meet or exceed the listed specifications by following these procedures repair is necessary With the exception of pre adjustment procedures and adjustments made on the CRT Drive Board the adjustments for the 1240 1241 Logic Analyzers are identical Refer to the 1240 1241 Logic Analyzer Service Manual for adjustments not given in this section LIMITS AND TOLERANCES All limits and tolerances given in the following procedures are adjustment guides They should not be interpreted as instrument specifications unless they are also found in the performance requirements column of the Specifications section Tolerances given are for the instrument and do not include test equipment error EQUIPMENT REQUIRED To complete all of the adjustment procedures equipment equivalent to that listed at the beginning of this Verification and Adjustment Procedures section is required A list of equipment needed for each individual check and adjustment is provided at the beginning of each procedure Ve
264. art Number 4148140 307 0587 00 RES NTWK FXD FI 7 68 0HM 202 0 1254 91637 CSCOBA01 680 OR MSPO 148147 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 57668 100 5 0 25w Al4R155 307 0587 00 RES NTWK FXD F1 7 68 0HM 202 0 125W 91637 CSCOBA01 680 OR MSPO Al4R185 315 0101 00 RES FXD FILM 100 0HM 52 0 25W 5 668 100 5 0 25w ALAR215 307 0587 00 RES NTWK FXD FT 7 68 0HM 202 0 125W 91637 5 08 01 680 OR MSPO 148220 307 0587 00 RES NTWK FXD FI 7 68 OHM 202 0 125W 91637 CSCOBA01 680 OR MSPO Al4R225 307 0587 00 RES NTWK FXD FI 7 68 OHM 20 0 125W 91637 CSCO8A01 680 OR MSPO 48230 307 0587 00 RES NTWK FXD F1 7 68 OHM 20 0 125W 91637 CSCOBA01 680 OR MSPO AL4R240 307 0587 00 RES NTWK FXD FI 7 68 0HM 202 0 1254 91637 CSCOBA01 680 OR MSPO AL4R250 307 0587 00 RES NTWK FXD FI 7 68 20 0 1254 91637 CSCO8A01 680 OR MSPO A14R265 307 0587 00 RES NIWK FXD FI 7 68 OHM 20 0 125W 91637 CSCOBA01 680 OR MSPO 4148275 307 0587 00 RES NTWK FXD FI 7 68 0HM 202 0 1254 91637 CSCOBAO1 680 OR MSPO AL4R285 307 0587 00 RES NTWK FXD FT 7 68 OHM 20 0 125W 91637 1 680 OR MSPO AL4R295 307 0598 00 RES NTWK FXD FT1 7 330 0HM 22 1 0W 91637 5 013316 OR CSCO 148310 307 0587 00 RES NTWK FXD F1 7 68 OHM 20 0 125W 91637 5 08 01 680 OR MSPO AL4R312 315 0120 00 RES FXD FILM 12 0HM 52 0 25W 19701 12 5 0 25w Al4R314 315 0911 00 RES FXO FILM 910 OHM 52 0 25W 57668 910 5 0 25w ALAR320 307 0587 00 RES NTWK FXD F1 7 68
265. cant To prevent damage from electrical arcing ensure that all circuit boards switches and board interface connectors are completely dry Do this by heating the board or switch in an oven at 75 degrees Celsius 167 degrees Fahrenheit for 15 minutes before applying power Maintenance 1241 Addendum INSPECTION Inspect the instrument for broken connections frayed wires poorly seated components leaking capacitors damaged hardware and heat damaged components Repair any obvious problems However take particular care if you find any heat damaged parts Overheating usually indicates other circuit problems To prevent recurrence of the damage find and correct the cause of the overheating Note that replacement of instrument electrical components may necessitate readjustment of the affected circuitry Refer to the Replaceable Electrical Parts Section for a list of part and component descriptions SOFT KEY LED CLEANING The 1241 soft keys are displayed along the top and bottom of the screen Sensing of keystrokes on these keys is done using a combination of LEDs and phototransistors attached to a frame Surrounding the screen Dust may accumulate on the LEDs phototransistors or other parts resulting in diagnostic failures To avoid these diagnostic failures perform the soft key LED cleaning procedure Depending on the environment it may be necessary to clean the interior of the 1240 1241 periodically Under very dusty conditions cleanin
266. cessor and the associated ROM and RAM circuitry plus the diagnostic LEDs and their latch The microprocessor addresses the RAM through buffers A10U350 U345 and U340 and decoders A10U380 and U130 The microprocessor addresses the ROM through the same buffers and decoder A10U380 The microprocessor reads from the RAM and the ROM via bidirectional buffer A10U550 KERNEL AREA TEST DESCRIPTION The I O Processor Board has four LEDs that are used for fault analysis in the event of a kernel fail ure If the kernel should fail at any point in the initial diagnostics the LEDs will indicate at what stage the fault occurred The following table summarizes the LED error conditions For more specific information refer to the error index descriptions later in this section I O PROCESSOR KERNEL LED ERROR SUMMARY Led Status Probable Cause 0000 No instrument power up Bad power supply Reset circuit LED latch A10U335 or decoder U365 1111 Kernel failure Unable to execute diagnostics Bad processor A10U445 or bad ROM A10U160 1110 Began executing diagnostics code but could not get to RAM tests Bad ROM A10U160 1101 Entered RAM test but did not finish Bad ROM A12U175 located on Display Board 11F 1 RAM test failed The 1241 is looping on a bad address Bad RAM A10U150 11FF RAM test failed The 1241 is looping on a bad address Bad RAM A10U145 1011 Began byte complement test on ROM A10U160 but did not finish Bad ROM A10U160 1F
267. ck Causing Internal Trigger External Trigger in Window External Trigger in Signal Trigger Window Figure 2 1 External Trigger acceptance window Pulse Width 8ns 12ns gt 0 5ns depending on A14J510 83 3 0 2ns or T1 1667 2 T1x2 6 5ns 1 0ns Figure 2 2 TPG clock and data outputs 378 01 Table 2 1 cont Specifications 1241 Addendum 1241 ELECTRICAL SPECIFICATIONS Performance Characteristic Requirements POWER cont 5 V supply regulation 3 4 85 V min 5 15 V max ripple 100 mV max rated current 1 or 2 acquisition cards 3 or 4 acquisition cards current limit 90 V fine 1 or 2 acquisition cards 3 or 4 acquisition cards over voltage protection point 3 V supply regulation 1 90 to 2 10 V below 5 V ripple 100 mV max rated current current limit point 5 V supply regulation 5 4 75 V min 5 25 V ripple 100 mV max rated current current limit point 12 V supply regulation 5 11 4 V min 12 6 V max ripple 1 V max rated current current limit point Supplementa Information Measured at any point on the Interface Bd 19e measured at the voltage sense point on the interface Bd Low load setup 11 6 A min 29 0 A max High load setup 30 0 A min 45 0 A max Includes 3 V supply current Measured w max specified load on all other supplies fan running low speed Low load setup 29 A mi
268. clock or the Clock Divid Check the 19 6 MHz clock at A12U495 pin 4 Check er circuitry is not working the output frequencies of the Clock Divider A12U485 The generated character was not Suspect the Video Generator A12U235 and U230 correct The circuitry to invert the 9 8 MHz H Suspect the 9 8 MHz H inversion circuitry A12U420 or clock is not working U305 The INDEX signal inversion circuitry is Suspect the INDEX inversion circuitry A12U420 and not working U305 Troubleshooting Repair 1241 Addendum 3512 Error index Explanation The highlight space character could not be read back from the Green RAM with the 9 8 MHz H clock inverted Probable Cause Action The 9 8 MHz clock inversion circuitry is Suspect the 9 8 MHz inversion circuitry A12U420 and not working U305 The circuitry to invert the INDEX signal Suspect the INDEX inversion circuitry A12U420 and is not working U305 3513 Error index Explanation The highlight space character could not be read back from the Green RAM with the normal 9 8 MHz H clock Probable Cause Action 9 8 MHz clock inversion circuitry is Suspect the 9 8 MHz inversion circuitry A12U420 and not working 0305 The circuitry to invert the INDEX signal Suspect the INDEX inversion circuitry A12U420 and is not working 0305 3514 Error index Explanation The highlight space character could not be read back from the Red RAM with the 9 8
269. cted to GND sense and 10 5K 0 1 between threshold sense and threshold out Characteristic 1240D1 OR 1240D2 ON EXTENDER Sequence Level Execution Rate Maximum Clock Rate Data Hold Time Qualifier Setup Hold Times Two Timebase Resolution T2 DEMUX Control Triggering DISPLAY BOARD ON EXTENDER Counter Timer TRIGGER BOARD ON EXTENDER Sequence Level Execution Rate Maximum Clock Rate 2 Control Triggering Specifications 1241 Addendum Table 2 4 EXTENDER LIMITATIONS Description Changes from 30 ns to 35 ns 1240D1 GLITCHES OFF 20 ns 124001 GLITCHES 22 Increases vary with configuration Maximum increases are 1240D1 data hold time increases from 2 ns to 4 ns 1240D2 data hoid time increases from 0 ns to 2 ns Increases vary with configuration Maximum increases are Qualifier setup time increases from 11 ns to 15 ns Qualifier hoid time increases from Ons to 2 ns Increases from 10 ns to 12 ns Extender adds 5 ns to both minimum delays between phases T2F T2L phase delay increases from 10 ns to 15 ns T2L T2F phase delay increases from 20 ns to 25 ns Giobal and sequential trigger are guaranteed only if the clock source and event recognizer source are both from the extended board or both from non extended boards Two timebase sequential triggering is not guaranteed for timebases that are asynchronous to each other Counter timer output is delayed Position of c
270. d glitch characters to the Display RAM The characters are then scrolled through the diagnostic window A10U295 and U190 The I O Processor reads back a portion of the displayed video from the diagnostic window to verify that it is correct The test starts by saving the contents of the Display RAMs in system RAM Then a timing waveform character graphically shown below is written to the Display RAM The display is scrolled vertically one raster line to align the top raster row of the character with the diagnostic win dow raster 200 Timing character mode is selected by writing FFrex to the first character position of line 25 Actually line 25 is filled with The timing waveform character is scrolled vertically eight rasters The I O Processor reads the diagnostic window each time the display is scrolled If a failure is detected the test ends and the failure is reported If no failure is detected the 9 8 MHz clock is inverted and the timing waveform character is checked again Verification with one phase of the 9 8 MHz clock checks the even numbered pixels and the other checks the odd numbered pixels When the timing waveform character has been successfully scrolled and read back the test writes the glitch waveform character graphically represented below to the Display RAM This time the display is scrolled vertically two rasters to align the top raster row of the character with the diagnostic window The glitch waveform charact
271. d includes a bus demultiplexing feature Total channel width varies from 9 channels one 1240D1 to 72 channels four 1240D2s The 1241 displays information on a 7 inch diagonal screen in three colors red green and yeliow The color display system consists of two basic elements a high resolution monochrome CRT liquid crystal color shutter With resolution based on that of the CRT the 1241 display provides very high resolution color The 1241 Logic Analyzer provides the following features dual independent timebases that allow correlation of synchronous and asynchronous data nonvolatile memory that retains patterns of instrument setup parameters after power down powerful triggering with two event recognizers that be used independently or together e data display in state table or timing diagram formats simple menu oriented user interface with front panel keyboard a display screen with touch sensitive on screen soft keys e auto acquisition mode for repeated acquisitions without manual restart of the instrument expandable acquisition memory depth with a memory chaining feature vertical expand feature that doubles the height of displayed timing diagram traces data search and compare functions remote operation with the GPIB or RS232C interface self test diagnostic routines that provide troubleshooting failure information REV NOV 1985 1 1 General Information 1241 Addendum A
272. down before accessing the power supply or related assemblies SOLDERING Most of the components in the instrument are soldered in place If it is necessary to replace a sol dered part use a 15 W soldering iron to prevent heat damage to the circuit board or components Excessive heat will lift circuit runs on the circuit board The flux in solder may leave a residue on the circuit board that can provide a high resistance leakage path and affect instrument operation Be sure to clean off this residue isopropyl alcohol is recommended LIGHT EMITTING DIODES LEDs To avoid damage to the LEDs always keep soldering time and temperature to a minimum Do not bend the leads or apply force when inserting them into circuit board holes Clean the circuit board holes of all excess solder before attempting to install a new LED NOTE Damage to the LEDs may not be immediately apparent Always follow the precautionary measures described when handling the LEDs Static discharge can damage any semiconductor in this instrument STATIC PRECAUTIONS Observe the following precautions to avoid damage Minimize handling of static sensitive components e Transport and store static sensitive components or assemblies in their original containers on a metal rail or on conductive foam Label any package that contains static sensitive components or assemblies Discharge the static voltage from your body by wearing a wrist strap while handling these c
273. e circuitry to invert the 9 8MHz Check that pin 2 on A12U420 goes low Suspect clock is not working A12U420 or U310 The Glitch Timing Character Latch is Suspect the Glitch Timing Character Latch A12U125 defective The Timing Character Parallel To Seri Suspect the Timing Character Parallel To Serial Con al Converter is defective verter A12U425 The Parallel To Serial Converter Out Suspect Latch A12U200 put Latch is not working The Video Generator is defective Suspect the Video Generator A12U230 and U235 3612 Error index Explanation While vertically scrolling the timing character an incorrect pattern was read back Probable Cause Action The circuitry that inverts the 9 8 MHz Check that 2 A12U420 goes high Suspect clock is not working A12U420 or U310 Troubleshooting and Repair 1241 Addendum 3613 3614 Error indexes Explanation While vertically scrolling the glitch waveform character an incorrect pattern was read back Probable Cause Action The Video Generator is defective Suspect the Video Generator A12U230 and U235 8 71 REPLACEABLE 9 ELECTRICAL SECTION PARTS Section 9 1241 Addendum REPLACEABLE ELECTRICAL PARTS PARTS ORDERING INFORMATION Repiacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to g
274. e the P6451 and P6107 probes from the top compartment of the TEKTRONIX 308 Data Analyzer Remove the probe tip P N 206 0252 00 from the top compartment and place it on the P6107 probe Connect the clip lead to 5 V the Vcc pin of a close by TTL 1 C Set the 308 analyzer s TTL VAR switch to TTL Connect the probes to the signature analyzer and power it on Select the 308 s standard signature mode and connect the P6451 s Clock Start and Stop leads as indicated by the table Tables 8 7 and 8 8 contain Clock Start and Stop polarity settings and signatures for the Control Processor kernel circuitry The polarity settings are taken from test points located on the Control Processor Board NOTE To ensure a proper signature analyzer setup check 5 volt and ground signatures against the table being used Troubleshooting and Repair 1241 Addendum Table 8 4 I O P SIGNATURES CPU BUFFERS AND DECODERS Clock I J280 1 4 5 Volts 0001 Start f J280 9 GND 0000 Stop J280 9 indeterminate Location Signature Location Signature Location Signature Location Signature A10U445 A10U340 11 12 4231 1 1293 2 12 13 4231 2 HAP7 13 14 0001 3 3C96 14 A10U120 4 3827 A10U350 1 52F8 5 755P 7 2 HC89 6 0001 A10U130 3 2H70 7 0000 4 9840 8 0000 5 0000 9 0000 6 1 10 0000 7 4814 11 0001 8 0000 12 0000 9 4869 13 0000 10 1P7P 14 0000 11 A5U0 15 0000 16 12 2H75 16 0000 A10U345 13 3P95 17 0001 A10U360 14 F388 18 0001 15 16
275. ecific removal procedures With the instrument power OFF connect the probe ground lead to the chassis Touch the probe tip to the anode connector located under the anode cup on the back of the CRT Make sure that the connector still fits tightly in the hole Power ON the 1241 and check that the high voltage is 12 V 0 6 V 1000x attenuation Power OFF the 1241 and remove the probe Re install the CRT Drive Board bracket 5 9 Verification and Adjustment Procedures 1241 Addendum 5 10 Procedures 3A 3E TEST PATTERN GENERATOR PERFORMANCE CHECKS Refer to the 1240 1241 Logic Analyzer Service Manual These procedures are the same for both 1240 and 1241 Logic Analyzers PART 2 FUNCTIONALITY CHECKS The Functionality Checks for the 1241 Logic Analyzer are identical to those for the 1240 Refer to the 1240 1241 Logic Analyzer Service Manual for functionality check procedures PART 3 ACQUISITION AND SYSTEM PERFORMANCE CHECKS The Acquisition and System Performance Checks for the 1241 Logic Analyzer are identical to those for the 1240 Refer to the 1240 1241 Logic Analyzer Service Manual for these procedures Part 3 Acquisition And System Performance Checks when used with the Part 7 Supply And TPG Performance Checks provide the test setups necessary to verify specifications listed in the Performance Requirements column of the Specifications section These checks do not use the Diagnostic ROM pack and therefore may be extensive
276. ed Indicates the area where the failure occurred Indicates the routine number of the failed test indicates the specific error number Error Index 1234 5378 71 Figure 8 15 1241 error index format 8 31 Troubleshooting and Repair 1241 Addendum Various troubleshooting information sources may be accessed by using the four digit error index The following list outlines some of these diagnostic troubleshooting aids page edge tabs for quick location of error indexes area block diagrams showing the involved circuit blocks component locators showing the board locations of involved parts test descriptions that state the nature of the diagnostic test lists of probable causes and recommended actions for repair Since each error index is linked to many types of diagnostic information sources it is important to understand the connection between all of these informational areas Troubleshooting An Example Failure in the 1240 1241 Logic Analyzer Service Manual develops a procedure showing how to access all available troubleshooting information for a sample error index 8 32 Troubleshooting and Repair 1241 Addendum I O PROCESSOR KERNEL LED ERROR INDEXES LED Status Test Name Stage Number 0000 Power Up Stage 0 1111 1110 1101 RAM Stage 1 1011 ROM Stage 2 0101 COMM Pack Stage 3 0 OFF 1 ON F flashing MSB LSB LED Position LED Number A10DS538 536 534 5
277. edures 1 3 and 5 Disconnect the cable at A4P150 on the LED 2 Board USE EXTREME CAUTION WHEN WORKING AROUND THE CRT Do not nick or scratch the glass or subject it to undue pressures Rough handling may cause it to violently implode Always replace the color shutter assembly before powering up the instrument the shutter acts as an implosion shield Unsnap the four boards from their mounting posts PROCEDURE 8 1241 CRT DRIVE BOARD REMOVAL DISASSEMBLY 1 2 Perform Procedures 1 and 2 given in the 1240 1241 Logic Analyzer Service Manual Remove the 10 4 flat head screws holding the CRT Drive Board bracket and the Rear Panel to the mainframe Refer to Figure 6 1 If necessary unplug the cabling from the CRT the rear panel and the Interface Board to the CRT Drive Board to facilitate removal of the bracket from the mainframe If necessary remove the 14 4 pan head screws holding the CRT Drive Board to the CRT Drive Board bracket Remove the 5 16 inch nuts which connects the CRT Drive groundstrap to the chassis Use the installation hints on the following page when replacing the CRT Drive Board bracket Always re install the CRT Drive Board bracket as soon as possible to remove exposed voltages from the work environment Figure 6 1 Location of screws for CRT Drive Board bracket removal REV MAR 1986 6 3 Disassembly Installation Procedures 1241 Addendum 5378 19 Figure 6 1 Location of screws for
278. edures consist of Part 1 Supply And TPG Checks Part 2 Functionality Checks and Part 3 Acquisition And System Performance Checks Parts 1 and 3 do not require a Diagnostic ROM pack to be available for use during the performance tests Use both of these parts for verification of specifications listed in the Performance Requirements column If however the Diagnostic ROM pack is available Part 2 Functionality Checks should be performed in addition to these checks These Functionality Checks instruct the user to run diagnostic tests that reside externally in the Diagnostic ROM pack These diagnostic tests along with other tests provide a functional verification of approximately 95 of the 1241 circuitry The test results aid in showing the operational status of the instrument as a system PART 1 SUPPLY AND TPG PERFORMANCE CHECKS The checks outlined in Table 5 2 provide testing of performance specifications listed in the performance requirements column of the Specifications section The tests do not require the use of the Diagnostic ROM pack If a thorough check of all specifications is necessary also complete in order the Part 2 Functionality Checks a Diagnostic ROM pack is required and Part 3 Acquisition And System Performance Checks no ROM pack required If a procedure has more than one part e g 1A and 1B perform all parts of the procedure Verification and Adjustment Procedures 1241 Addendum NOTE The specifications tested
279. efective The Character Generator is defective The signal VLATCH is in the wrong phase Action Suspect the Horizontal Scrolling Registers A12U195 and 0295 Suspect the Low Address Counter A12U198 and U298 Suspect the Display Formatter Latch A12U125 Suspect the Character Generator A12U235 and U230 Check A12U420 pin 7 for a high Check that the VLATCH pulse A12P650 A47 occurs while the VDRIVE GREEN signal A12U310 pin 13 is high If it does not suspect A12U310 and or U420 3312 Error index Troubleshooting and Repair 1241 Addendum Explanation While scrolling horizontally an incorrect pattern was read back The pattern expected was C7 Probable Cause The Horizontal Scrolling Registers are defective The Low Address Counter is defective The Display Formatter Latch is defective The GO TO TIMING circuitry is not working The Video Generator is defective The circuitry that inverts the 9 8 MHz clock is not working The INDEX signal is inverted 3313 Error index Action Suspect the Horizontal Scrolling Registers A12U195 and U295 Suspect the Low Address Counter A12U198 and U298 Suspect the Display Formatter Latch A12U125 Check that the TMODE pin 16 on A12U230 and U235 and the GTMODE pin 1 on A12U310 pin 5 on U170 and 5 on 0295 signals are going high for character line 25 Check the TMODE L signal at pin 12 A12U100 and the GTMODE L signal at pin 2 on
280. eing used Figure 3 1 shows the location of the LINE SELECTOR If the selector shows the wrong voltage for the power source being used push the LINE SELECTOR switch to the appropriate position Also change the line voltage fuse located in the holder labeled FUSE positioned above the LINE SELECTOR refer to Figure 3 1 To access the fuse twist the spring loaded fuse holder counterclockwise A label listing the fuse requirements is located beside the LINE SELECTOR Refer to the Replaceable Electrical Parts section for a list of fuse part numbers Before applying power to the mainframe verify that the LINE SELECTOR the line voltage fuse and the power cord are compatible with the power source being used POWER 1 ver ORE FORE Tor om MGH L AGE CURRENT TO AVCHD Pec TRC SHOCK THE PROTECT GROUNDING CONDUCTOR MUST CONNECTED TO GROUND 000000 OO 5 WETRUMENT m WHOLE OR tN Y PROTECTED BY ONE OR FOREIGN PATENTS WT APPL INFORMA PROV VIDED ON pede BEAVERTON OREGON Oo 000 HER D D D D D D D D Figure 3 1 1241 rear panel Operating Information 1241 Addendum 3 2 FUSES The 1241 uses the following fuses FUSE APPLICATION 7AF 250 V 115 V line select 4AF 250 V 3AG 230 V line select Refer to the Replaceable Electrical Parts section for a list of fuse part numbers Refer to the Replaceable Mechanical Parts
281. ektronix maintains repair and recalibration facilities at its local Field Service Centers and the Factory Service Center For further information or assistance contact your local Tektronix Field Office or representative TOOLS REQUIRED FOR MAINTENANCE The following tools are those most often needed when servicing the 1241 Logic Analyzer e soidering iron 15 W rosin core solder 60 40 e isopropyl alcohol e lint free dust cloth soft bristle brush E IC extractor desolder tool e solder wick e slotted screwdriver magnetic screwdriver 1 4 inch drive POZIDRIV type bit 1 POZIDRIV type bit 2 Phillips type bit 0 TORX type magnetic bit size T 20 Tek P N 003 0866 00 angled tweezers 6 inch e long nose pliers e 1 4 5 16 1 2 and 9 16 inch combination wrenches Allen wrench 1 16 inch 7 1 Maintenance 1241 Addendum 7 2 MAINTENANCE PRECAUTIONS WARNING Dangerous electric shock hazards outside and inside the mainframe may be exposed when the cabinet is removed Be sure both front and rear panel power switches are off and the power cord is disconnected before removing the cabinet Disassembly procedures should only be attempted by qualified service personnel A lighted or blinking neon lamp on the power supply board visible through a hole on the power supply cover adjacent to the warning label indicates that a lethal voltage is present on that board Wait for at least 15 minutes after powering
282. en the 1241 is powered up or when the manual reset is pressed If this test is not completed the LEDs will remain on Probable Cause Action Kernel failure Move NOP jumper A10J450 to the TEST position pin 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the Z80 microproces sor address data and control lines with a signature analyzer and verify values listed in Signature Analysis Wrong data in ROM or diagnostic Suspect diagnostic ROM A10U160 ROM failure Bad data buffer Suspect U550 Bad address decoder Suspect U380 8 38 Troubleshooting and Repair 1241 Addendum 1110 LED Error Index Explanation The LED DS532 will be turned off when the diagnostic ROM is entered The code that follows this action will initialize the display registers A12U145 and U245 clear the screen and print DIAGNOSTICS IN PROGRESS on the screen Probable Cause Action Kernel failure Move NOP jumper A10J450 to the TEST position pin 2 to 3 Remove the resistor pack A10R455 and buzzer disable jumper A10J315 Check the 280 microproces sor address data and control lines with a logic analyz er or signature analyzer and verify values listed in Kernel Signature Analysis Diagnostic ROM failure Suspect the diagnostic ROM A10U160 8 39 EL BLES 2014 10 920Jd O I 81 8 snBi3 8 858300 1 5 WNOO 113S3u
283. er is scrolled vertically eight rasters The I O Processor reads back from the diagnostic window after each scroll operation This sequence is performed twice once with the 9 8 MHz clock non inverted and once with it inverted If a failure is detected the test ends and the failure is reported A graphic representation of the timing and glitch waveform characters an 8 8 matrix is shown in the following e X X X X amp e e e e e e e amp e X e e e e X X 9 e e 9 X o X X e e X e X X X o X X o ee XXXX XX XX XX Timing Waveform Glitch Waveform Character Character Troubleshooting and Repair 1241 Addendum 8 70 3610 Error Index Explanation Before each read of the diagnostic window register a 60 Hz interrupt must occur In this case the 60 Hz interrupt did not occur and the diagnostic test was not run Probable Cause Action 60 Hz interrupt is not working Run the I O Processor INTERRUPT area diagnostic correctly test to determine why the interrupt is not working Since the I O INTERRUPT test has already been run before reaching this point the failure is probably inter mittent Looping on the interrupt test may help in finding the error 3611 Error Index Explanation While vertically scrolling the timing waveform character an incorrect pattern was read back Probable Cause Action Th
284. er to Figure 4 10 When the display is in char acter mode the address multiplexers A12U160 U165 and U260 allow the High Address Adder and the Character Counter to address the Display RAMs When the 2 4 MHz L clock goes low the multiplexers allow the I O Processor to address the Display RAMs When the display is in timing or graticule mode the IOP LOCKOUT H signal prevents the 1 Processor from accessing Display RAM When the 2 4 MHz L signal goes low addresses generated by the High Address Adder and by the Character Counter are used to access timing in formation The timing information is then latched by A12U240 on the next rising edge of 2 4 2 1 When 2 4 MHz L goes high cursor and highlight information is accessed by forcing the five most significant bits of the multiplexer outputs to a low state The cursor and highlight infor mation is then latched in A12U1240 on the next falling edge of 2 4 MHz L DISPLAY TIME U140 PIN 11 CHARACTER MODE U240 PIN 11 TIMING MODE L LATCH CURSOR LATCH TIMING GLITCH AND HIGHLIGHT DATA DATA Figure 4 10 Display memory access times 4 15 Theory of Operation 1241 Addendum 4 16 DISPLAY MODE CONTROL lt gt Two special characters are used to control the display mode If FFnex is detected on the Y data bus while the display is in character mode the TMODE H signal goes active When TMODE H is active the PALs interpret all data presented to them as timing cu
285. es the screen display image on the CRT Figures 4 2 and 4 3 illustrate the 1241 mainframe board locations Figure 4 4 shows the board connections Theory of Operation 1241 Addendum The display system consists of a 7 inch CRT a Liquid Crystal Color Shutter LCCS a CRT Drive Board and a Display Board The CRT Drive Board generates the high voltage for the CRT the ver tical and horizontal sweep signals the Z axis signal and the LCCS drive signals The Display Board logic outputs character and timing diagram symbols according to the information it receives from the I O Processor The logic also controls the positioning of characters on the screen thus supporting text and timing diagram scrolling features ty ed Soy lt Fa sa Figure 4 2 1241 mainframe board locations Tr INTERFACE Theory of Operation 1241 Addendum at Fler 4 14 Am ag t CONTROL B m RT I O PROCESSOR um RET DISPLAY pep PROCESSOR DN E 5 mai 9 OR 18 CHANNEL ACQUISITION x 2 e TRIGGER Figure 4 3 1241 card cage board locations 4 4 Theory of Operation 1241 Addendum 1241 CABLES AND CONNECTIONS SOFT KEY LED PHOTO lt ae TRANSISTOR MATRIX lt SUBPANEL 01 02 03 04 9150 x LIQUID CRYSTAL COLOR SHUTTER NN A A J675 J287 J288 J184
286. essor correct no A14U635 no Board slot problems A14U640 problems A10U295 U385 Display A09U264 correct A15U390 CR678 Board slot problems 18 Channel no correct won t Board problems slot fit A16U261 CR259 may disable 9 Channel power switch correct won t Board use rear panel slot fit power switch A10U295 U385 Trigger instrument A11U405 U495 correct Board may not A15U390 CR678 slot power up 151 565 A16U261 CR259 A16U538 only the acquisition board immediately below the Trigger Board Troubleshooting and Repair 1241 Addendum POWER SUPPLY TROUBLESHOOTING Troubleshooting of the 1241 power supply should only be performed by qualified service personnel If a power supply is suspected of being faulty check the following areas before continuing with troubleshooting procedures ac line cord properly installed rear panel MAIN POWER SWITCH in proper position rear panel line selector switched to the proper position rear panel ac line fuse in good condition thermal fuse on the Interface Board not blown due to excessive instrument temperature power supply load jumper in proper position refer to the Maintenance section When troubleshooting the 1241 power supply do not circumvent the opera tion of any voltage or current protection circuitry If protection circuitry is disconnected damage may occur to the power supply and other boards 1241 Thermal Fuse The 1241 is equipped
287. et from a sequential event to the counter is only guaranteed if both sequential and global events use the same filter clock Maximum rate for enable disable Iteration counter count of valid events be fore sequential event is satisfied Range is 1 9 999 event occurrences Count of clocks before sequential event is satisfied Counter timer reset takes 100 ns prior to restart Trigger position is within one stored clock of event causing trigger If reset and trigger occur together a trigger occurs When AFTER MEMORY FULL is the trigger position selection a trigger before memory is full causes a reset If the counter timer causes a trigger at the same time that the sequential event causes a reset the counter timer will be set to 0 and the 1241 will trigger Range is 1 to 99 999 999 999 events Timer value truncated to 4 digits Filter clock must equal the sample clock Specifications 1241 Addendum 2 4 Table 2 1 cont 1241 ELECTRICAL SPECIFICATIONS Performance Characteristic Requirements Supplemental Information Only first occurrence of next phase is valid Successive clocks without an intervening alternate phase are ignored T2 DEMUX CONTROL Phase delay between first phase T2 F and last phase T2 L Phase delay between last phase T2 L and first phase T2 F 10 ns to 1 5 in 1 2 5 increments 0 01 ASYNC TIMEBASE average accuracy The 1241 can resolve the difference be tween a T1 a
288. g every six months or less may be required The steps listed in the following are LED cleaning procedures for the 1241 Logic Analyzer for 1240 LED cleaning procedures refer to the 1240 1241 Logic Analyzer Service Manual 1 Section 6 of this manual contains disassembly procedures read Overview and General Disassembly Installation Precautions in that section before attempting any disassembly 2 Also in Section 6 follow disassembly procedure 7 to remove the 1241 LED Phototransistor Boards from the front of the instrument it is not necessary to remove the boards from their mounting posts 3 Clean all surfaces of the mounting frame the circuit boards and the components on those boards by following the instructions provided under nterior Cleaning in this section NOTE It is recommended that you also clean all of the surfaces surrounding the LED Phototransistor Boards to prevent the rapid re accumulation of dust on the soft key components 4 Reassemble the 1241 by reversing the steps for disassembly Power ON the 1241 and verify that the disgnostics pass If the soft key test fails perform pro cedure 1B CRT Soft Key Sensitivity Adjust in Section 5 of the 1240 1241 Service Manual Mf the soft key diagnostics continue to fail or other diagnostic tests fail refer to the troubleshoot ing information in Section 8 of the 1240 1241 Service Manual or contact your local Tektronix Service Center CORRECTIVE MAINTENANCE Corrective ma
289. g should be performed only by qualified service personnel Troubleshooting and Repair 1241 Addendum DISCHARGING THE CRT The following precautions should be observed when working on the CRT CRTs RETAIN HAZARDOUS VOLTAGES FOR LONG PERIODS OF TIME AFTER POWER DOWN The CRT should be serviced only by qualified personnel familiar with CRT servicing procedures and precautions ENSURE that both front and rear panel power switches are in the OFF position before attempting servicing procedures USE EXTREME CAUTION WHEN HANDLING THE CRT Rough handling may Cause it to violently implode Do not nick or scratch the glass or subject it to undue pressures during removal or installation When handling the CRT wear safety goggles and heavy gloves for protection BEFORE ATTEMPTING ANY WORK ON THE CRT discharge the CRT by shorting the anode connection to chassis ground using a plastic handle screwdriver When discharging place the screwdriver against the chassis then slip the screwdriver tip under the CRT anode cup STATIC DISCHARGE DAMAGE Special Handling Required All semiconductor devices in the instrument are susceptible to damage by static discharge Most of the devices used in the 1241 are static sensitive and may be damaged by improper handling See Table 8 2 for the relative susceptibility of various classes of semiconductors Static voltages of 1 to 30 kV are common in unprotected environments 8 3 Troubleshooting and Repair 1
290. i 9 iiid 14 x x 5 Lo 74504 Q 94 955 13 17 74504 cu N C Q NCC amp 3 4 e 18 D Q 19 5 GND pm 7 us 22 Bees vRESC 175490 Rte qd lt 19 60 M H 5 45 T 14 R Q lt OF 74504 U270A 13 12 24MHZCH A30 RS H RSCH 74310 1 2 H R4 H i3 12 lt U495A 2 INDEX L amp y 74504 LATCH 200 L 2 UZA U4ISA UIS B U4IOE 4 535 0405 4 74574 4 72574 74LS32 74 1504 lt 74974 74 ASB32A 2 5 2 5 NORINE GREEN H 82 RS H 5 N C s io 2 7 9 P 3 P e 5 bQ 3 3 8 P O 0405 41 ne RS RS e TOP LOCKOUT IFASBBZA Aes RD 5 Me oa qu G 15 l 2 UIOSB T BLNK H aes rw 1 T LSO amp 2 4M CL OP 4 8M H A49 DREG 5 9 749 8175 ID CH 4 m 2 9 T4586 UIOSA d 4532 Te ic A4 IQ a H 5 7 12 20 lt BMCH 2Q N C 9 ID2 H 1212 io EXPN CH 5 19 GM CH e ID3CH 40 4Q 15 x 88 BSS is 3OSA r E cm COREE Sen Mum SQ 22 2 USOSA emm Ed dete U305B 4 74574 U200B U308B 12 9 74574 2 5 Fi 4 IOo 74574 74874 S E E UIOOC amp 3129 1 oo 5 200 2 9 74 504 112 EC
291. ifications Table Specification 2 1 1241 Electrical Specifications 2 2 1241 Environmental Specifications 2 3 1241 Physical Specifications Electrical Specifications for 1240D1 and 1240D2 Aquisition Cards and for Extender Board Limitations are located in the 1240 1241 Service Manual Items listed in the Performance Requirements column are product specifications that can be verified If verification of the listed electrical characteristics is required for incoming inspection other purposes Section 5 Verification and Adjustment Procedures lists the test equipment and necessary steps Items listed in the Supplemental Information columns are either explanatory notes or performance characteristics for which no limits are specified They cannot be verified by the verification and adjustment procedures listed in this manual PERFORMANCE CONDITIONS The performance characteristics in this section are valid under the following conditions 1 The 1241 Logic Analyzer must be in an operating environment whose limits are listed in Table 2 2 1241 Environmental Specifications 2 The 1241 Logic Analyzer must have been calibrated at an ambient temperature between 20 C and 30 C after a 30 minute warm up 3 All specifications whose measurement involves the use of a Data Acquisition Probe have been based on the P6460 probe Any applicable conditions not listed above but unique to a particular characteristic are stated as part of that characteri
292. intenance for the 1241 Logic Analyzer is the same as that for the 1240 Refer to the 1240 1241 Service Manual for corrective maintenance instructions REV FEB 1987 7 5 TROUBLESHOOTING AND SECTION REPAIR SECTION 8 TROUBLESHOOTING AND REPAIR OVERVIEW OG spe CI Su AERA 8 1 TROUBLESHOOTING EQUIPMENT 8 2 USING THE 1240 EXTENDER BOARDS 8 2 REPLACING DEFECTIVE PARTS 8 2 LIST OF ASSEMBLIES 8 2 TROUBLESHOOTING PRECAUTIONS 8 2 Discharging The CRT 8 3 Static Discharge Damage Special Handling Required 8 3 Operating The 1241 With The Cabinet Removed 8 4 1241 TROUBLESHOOTING WITHOUT ERROR INDEXES 8 5 Damage Resulting From Incorrect Board Installation 8 5 Power Supply Troubleshooting 8 6 1241 Thermal FUSE 22222539200 usa 8 6 1241 Power Supply Troubleshooting Trees 8 6 CRT Drive Board Troubleshooting 8 11 rlOcessOl LEDS ene 8 25 Kernel Signature Analysis 8 25 I O Processor Kernel Troubleshooting 8 25 Control Processor Kernel Troubleshooting 8 26 TROUBLESHOOTING USING DIAGNOSTICS E
293. is separated from the description by colon Because of space limitations an item Name may sometimes appear as incomplete For further Item Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible MFR CODE column six of the Electrical Parts List indicates the code number of the actual manufacturer of the part Code to name and address cross reference can be found immediately after this page MFR PART NUMBER column seven of the Electrical Parts List Indicates actual manufacturers part number 9 1 Replaceable Electrical Parts 1241 Addendum CROSS INDEX MFR CODE NUMBER TO MANUFACTURER eas Manufacturer Address City State Zip Code 00681 MINE SAFETY APPLIANCE CO 1421 CLARKVIEW RD BALTIMORE MD 21209 2103 0779 AMP INC 2800 FULLING MILL HARRISBURG PA 17105 0853 SANGAMO WESTON INC SANGAMO RD PICKENS SC 29671 9716 COMPONENTS DIV PO BOX 18 1121 ALLEN BRADLEY CO 1201 5 2 ST MILWAUKEE WI 53204 2410 01295 TEXAS INSTRUMENTS INC 13500 N CENTRAL EXPY DALLAS TX 75265 SEMICONDUCTOR GROUP PO BOX 655012 1537 MOTOROLA 2553 N EDGINGTON ST FRANKLIN PARK IL 60131 3401 01807 PETERSEN RADIO 00 INC 2800 WEST BROADWAY COUNCIL BLUFFS IA 51501 3412 PULSE ENGINEERING SUBSIDIARY 0 BOX 12235 1961 VARIAN ASSOCIATES INC 7250 CONVOY CT SAN DIEGO CA 92112 113 COILCRAFT INC 1102 SILVER LAKE RD CARY IL 60013 1658 3508 GENERAL ELECTRIC CO W GENESEE ST AUBURN NY 13021 01072 BELL IND
294. ive you the benefit of the latest circuit improvements developed in our engineering department It is therefore impor tant when ordering parts to include the following information in your order Part number instrument type or number serial number and modification number if applicable if a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Officeor represen tative will contact you concerning any change in part number Change information if any is located at the rear of this manual LIST OF ASSEMBLIES A list of assemblies can be found at the beginning of the Electrical Parts List The assemblies are listed in numerical order Whenthe complete component number of a part is known this list will identify the assembly in which the part is located CROSS INDEX MFR CODE NUMBER TO MANUFACTURER The Mfr Code Number to Manufacturer index for the Electrica Parts List is located immediately after this page The Cross Index provides codes names and addresses of manufac turers of components listed in the Electrical Parts List ABBREVIATIONS Abbreviations conform to American National Standard Y 1 1 COMPONENT NUMBER column one of the Electrical Parts List A numbering method has been used to identify assemblies subassemblies and parts Examples of this numbering method and typical expansions are illustrated by the following component number R1234 Example a A23R1234 A23
295. ls is latched by A12U225 on the next rising edge of the 2 4 MHz L clock When the display is in character mode data from the Display RAMs is presented to the Character ROM on the rising edge of the 2 4 MHz L clock The Character ROM decodes the information to generate the character pixels The 8 bit pixel word is inverted through the PALs and is latched by A12U225 on the next rising edge of of the 2 4 MHz L clock The signal is inverted again by A12U415 PARALLEL TO SERIAL CONVERTER When the signal LOADC L becomes active the parallel in serial out shift register A12U425 loads the parallel 8 bit pixel word from latch U225 To accomplish horizontal scrolling in timing diagram displays the timing of LOADC L with respect to the 2 4 MHz L clock is shifted by changing the off set values in the horizontal scrolling registers The data is then converted to a serial stream that is clocked by 19 6 MHz H TIMING DIAGRAM VERTICAL EXPAND lt gt Vertical expand mode is selected when OP data bit ID2 is set high at the Control Register A12U420 This bit controls the select line of the Expand Multiplexer A12U120 The height of the timing diagram traces is doubled by causing each of the eight raster lines in a character row to be scanned twice Only timing diagrams can be vertically expanded When the display enters vertical expand mode the soft keys are removed from the screen and disabled VERIFICATION AND ADJUSTMENT SECTION PROCEDURES SECT
296. ly shielded Guard against injury by keeping fingers and loose objects away from the moving fan blades PROPER COOLING OF THE 1241 DO NOT operate the instrument with the cabinet removed for extended periods of time unless it is raised off the working surface at least one half inch If it is necessary to run the 1241 for extended periods of time raise the instrument off the working surface in order to admit air to the power supply for cooling purposes Additionally another fan should be positioned to blow air onto the instrument bulkhead just below the card cage when the card cage is rolled into the service position This additional air supply should be aimed at the power supply heat sink located on the bottom of the bulkhead When operating the 1241 in the service position the rear panel fan does not provide adequate cool ing for some boards installed on an extender board To circumvent this problem a fan should be po sitioned to biow air across these extended boards The boards that require additional cooling are any 9 Channel Acquisition Boards 18 Acquisition Boards the Trigger Board When operating the 1241 with the Power Supply CRT Drive compartment open the rear panel fan does not provide adequate cooling for the Power Supply and CRT Drive Boards An extra fan should be positioned to blow air across these two boards Verification and Adjustment Procedures 1241 Addendum TIMING LIMITATIONS
297. m the diagnostic window to verify that it is correct The diagnostic window register is latched by raster 200 the bottom pixel row of line 25 The diagnostic window register then contains every other one of the last eight pixels that were sent to the video monitor before raster 200 occurred Therefore if no vertical or horizontal scrolling is performed the register contains four pixels from each of the last two characters on line 25 The character scrolled through the window is a special diagnostic character It was selected because it supplies information that identifies which data line is bad in the character generation cir or which bit is bad in the scrolling circuitry A graphic representation of the diagnostic character being scrolled on an 8 X 8 matrix is shown below X e e e e e X e e X e The diagnostic character is scrolled upward by writing an incrementing count to the VSCROLL and VWRAP registers in the Vertical Scrolling circuitry As the character is scrolled the value read back through the diagnostic window register appears to be shifted right after each pixel is scrolled up two rasters Verifying all the pixels requires two scrolling passes of the diagnostic character through the window On the first pass 02 e is written to location ACOOnex thus inverting the 9 8 MHz clock The diagnostic character is scrolled once and read Then the diagnostic character is scrolled twice and
298. mber Mfr Component No Part Number Effect Discont Part Name amp Description Code Mfr Part Number 130102 151 1063 00 TRANSISTOR PWR MOS N CH 60V 0 8A 0 8 OHM 04713 IRFD113 130105 151 1183 00 TRANSISTOR PHR MOS P CH 60V 0 6A 1 6 OHM 81483 IRFD 9113 130107 151 1063 00 TRANSISTOR PWR MOS N CH 60V 0 8A 0 8 OHM 04713 IRFD113 A130110 151 1183 00 TRANSISTOR PWR MOS P CH 60V 0 6A 1 6 OHM 81483 IRFD 9113 130112 151 1063 00 TRANSISTOR PWR MOS N CH 60V 0 84 0 8 OHM 04713 IRFD113 A130175 151 0188 00 TRANSISTOR 51 TO 92 04713 282396 130176 151 0127 00 TRANSISTOR NPN SI TO 18 04713 282359 130176 151 0367 00 TRANSISTOR SIG BIPOLAR 25V 30MA 1 OGHZ 04713 SPS8811 SPECIAL 130177 151 0127 00 TRANSISTOR NPN ST TO 18 04713 282369 A130178 151 0367 00 TRANSISTOR SIG BIPOLAR NPN 25V 30MA 1 0GHZ 04713 SPS8811 SPECIAL 130188 151 0254 00 TRANSISTOR DARLINGTON NPN 51 625 TO 92 04713 5 14 A130237 151 0190 00 TRANSISTOR NPN SI 0 92 04713 2839 A130238 151 0435 00 TRANSISTOR DARLINGTON PNP SI TO 92 04713 5 65 A130267 151 0221 00 TRANSISTOR SIG BIPOLAR PNP 12V 80MA 04713 PN4258 A130273 151 0220 00 TRANSISTOR PNP SI 0 92 07263 203906 FAMILY 130275 151 1090 00 TRANSISTOR FET DUAL N CHANNEL SI 17856 285911 FAMILY A130277 151 0220 00 TRANSISTOR PNP SI T0 92 07263 28396 FAMILY 130334 151 1191 00 TRANSISTOR PWR MOS N CH 150V 5 0A 0 8 OHM 04713 STP7012 130455 151
299. ments for procedures 7 8 and 9 in the 1240 1241 Logic Analyzer Service Manual With the exception of these procedures the disassembly installation procedures for the 1241 are identical to those for the 1240 In the following procedures directional terms top bottom left right etc are based on the assumption that your 1241 is in a normal upright position and that you are facing the front of the instrument Installation or reassembly procedures are the reverse of the disassembly procedures unless otherwise noted In some cases installation hints are provided to aid in reassembly Dangerous electric shock hazards inside the mainframe may be exposed when the covers are removed Be sure both front and rear panel power Switches are off and the power cord is disconnected before removing the covers Disassembly procedures should only be attempted by qualified service personnel A lighted or blinking neon lamp on the power supply board visible through a hole on the power supply cover adjacent to the warning label indicates that a lethal voltage is present on that board Wait for at least 15 minutes after power down before accessing the power supply or related assemblies Disassembly Installation Procedures 1241 Addendum GENERAL DISASSEMBLY INSTALLATION PRECAUTIONS DO NOT attempt any disassembly or installation procedures if power is ON 9 DO NOT operate the 1241 with the cabinet removed or the card cage in the service position
300. n 34 A max High load setup 46 A min 52 A max 6 2 V 10 Measured at voltage sense point on Inter face Bd Measured on Interface Bd min 8 0 A max 8 0 A min 9 0 A max Measured on Interface Bd Measured on Interface Bd 0 A min 0 8 A max 0 8 A min 2 2 A max Measured on Interface Bd 0 A min 0 28 A max 0 3 A min 1 0 A max COMM PACK SUPPLY 4 12V 11 64 to 12 36 V Measured on COMM Pack Port pin B17 Specifications 1241 Addendum Table 2 1 cont 1241 ELECTRICAL SPECIFICATIONS Performance Characteristic Requirements Supplemental Information DISPLAY cont Power requirements 416 5 V dc at 3 0 Signal inputs Vert high green screen Horiz Negative at connector Video Positive at connector Input levels Standard TTL Video Response 30 V in 50 ns with lt 10 aberration High voltage 12 0 6 kV At maximum contrast Horiz 30 720 Hz 500 Hz Scanning Frequency V 120 H 6 H ert z z Adjustable from 5 V to 50 V thus vary ing the intensity from max to blank screen Contrast ratio FAN CONTROL Fan Speed With 4 1240D2 s installed fan switches be tween low and high speeds at approx 30 deg C room ambient More lightly loaded inst will switch at higher temp 9 5 V to 11 5 V 13 0 V to 15 0 V Low Speed Voltage High Speed Voltage 2 B Table 2 2 Specifications 1241 Addendum 1240D1 ELECTRICAL SPECIFICATIONS Characteristic ME
301. n In the event the 1241 does not detect a failure during power up access the diagnostics by holding down any front panel key during power up to induce a failure Some of the tests within the menus reside in the Diagnostic ROM pack found in the 1240 Service Maintenance Kit The Diagnostic ROM pack also contains manual diagnostic tests described later in this section and calibration routines The calibration routines are discussed in the Verification and Adjustment section in their respective adjustment procedures Table 8 9 indicates the location of the diagnostic code for each 1241 module Table Troubleshooting and Repair 1241 Addendum DIAGNOSTIC CODE LOCATION Module Code Location I O Processor I O Processor Frontpanel Processor Display Processor Comm pack I O Processor COMM pack Control Processor Control Processor Trigger Control Processor ROM pack 9 Channel Acq Control Processor ROM pack 18 Channel Control Processor ROM pack ROM pack Control Processor RAM pack Control Processor ERROR INDEX OVERVIEW Diagnostic troubleshooting of the 1241 is based on the use of screen displayed four digit error index numbers Each number position in the four digit sequence describes different information about the circuitry being tested Figure 8 15 shows the error index format and gives a description of the information indicated by each of the four digit positions Indicates the module where the failure occurr
302. n as the operating environment requires A convenient and appropriate time to perform these procedures is immediately prior to instrument adjustment EXTERIOR CLEANING Dust the exterior surfaces with a dry lint free cloth or soft bristie brush If hard dirt remains use a cloth or swab dampened with 5 mild detergent and warm water solution The swab is also useful for cleaning in narrow spaces around the controls Do not use abrasive compounds on any part of the instrument The glass front of the color shutter may be cleaned with any commercial glass cleaner To avoid getting moisture inside the instrument do not spray cleaner directly on the display screen Dampen a cloth with glass cleaner and gently wipe the screen To prevent getting water inside the instrument during external cleaning use only enough water to dampen the cloth or swab DO NOT use chemical cleaning agents as they may damage the plastics used in the instrument In particular avoid chemicals that contain benzene toluene xylene acetone or similar solvents REV FEB 1987 7 3 Maintenance 1241 Addendum 7 4 INTERIOR CLEANING To gain access to internal portions of the instrument refer to the instructions in the Disassembly and installation Procedures section of this manual Use a dry low velocity stream of air to clean the interior of the instrument A soft bristle brush is useful for cleaning around components If a liquid must be used for minor intern
303. n permission of Tektronix Inc Products of Tektronix Inc and its subsidiaries are covered by U S and foreign patents and or pending patents TEKTRONIX TEK SCOPE MOBILE and registered trademarks of Tektronix Inc TELEQUIPMENT is a registered trademark of Tektronix U K Limited Printed in the U S A Specification and price change privileges are reserved Tektronix inc Walker Road Industrial Park P O Box 4600 Beaverton Or 97076 MANUAL REVISION STATUS PRODUCT 1241 LOGIC ANALYZER SERVICE ADDENDUM RED DATE DESCRIPTION JUL 1985 First Printing NOV 1985 Revised pages 2 9 Electrical amp Mechanical Parts Lists JAN 1986 Revised pages 6 4 6 6 8 23 amp 8 24 MAR 1986 Revised pages 6 2 amp 6 3 MAY 1986 Revised pages 4 10 diagrams 45 46 Electrical amp Mechanical Parts Lists OCT 1986 Revised pages 2 5 Electrical amp Mechanical Parts Lists FEB 1987 Revised pages 7 3 amp 7 5 DEC 1987 Revised pages Diagram 45 Tables 10 2 10 6 10 7 Electrical amp Mechanical Parts Lists JUN 1988 Revised pages Electrical amp Mechanical Parts Lists FEB 1989 Revised pages Diagram 49 50 Electrical amp Mechanica Parts Lists JAN 1990 Revised paged 5 2 8 17 FIG 2 Chasis Electrical amp Mechanical Parts Lists TABLE OF CONTENTS LIST OF ILLUSTRATIONS LIST OF TABLES OPERATOR S SAFETY SUMMARY SERVICE SAFETY SUMMARY Section 1 Section 2 Section 3 Section 4 TABLE OF CONTENTS OPERAT
304. nd a T2 event if they occur 10 ns or more apart if they occur less than 10 ns from each other the timebase that was previously indicated as occurring first will now be indicated as occurring last TWO TIMEBASE CORRELATION Resolution of precedence be tween timebases 50 source Z 3 8 V min 1 9 V min 0 6 V max at 7 mA EXT TRIG OUT Vout high open Vout high 50 0 Vout low either Pulse width 70 ns min 120 ns max Delay probe tip clock to trigger 65 ns min 90 ns max out EXT TRIG IN input resistance 1 0 1 Input capacitance 37 pF 5 pF V input max 20 V See Figure 2 1 Window length 100 ns Acceptance window window starts 50 ns after clock that causes trigger x1 PROBES AND 50 2 TERMINATED COAX Input threshold 1 4V 100 Minimum pulse amplitude 1 8 V high 1 0 V low Minimum pulse width 20 ns x10 PROBES Input threshold 1 4V 500 Minimum pulse amplitude 2 4 V high 0 6 V iow Minimum pulse width 30 ns Minimum slew rate 5 V us Siave trigger located within 60 ns of master trigger TIME BETWEEN TRIGGERS FOR LINKED 1240 1241s Characteristic TEST PATTERN GENERATOR Clock period mode 0 no glitches mode 1 with glitches mode 2 no glitches mode 3 with glitches Pulse width Vout Skew channel channel Delay clock data Glitch modes 1 or 3 Clock period Glitch width Glitch amplitude POWER AC power input requirements power frequency 115 Vac
305. nd check the 9 8 MHz L signal at A12P650 Suspect 120308 0310 or U420 Loop on the VSCROLL test and check for 9 8 MHz at pin 8 on A12U405 Check for RG LATCH at pin 1 on A12U105 Suspect A12U308 U310 U405 or U480 Explanation While vertically scrolling the diagnostic character an incorrect pattern was read back The last digit of the error index 1 through F represents the number of read operations that were performed before the error 1 through F was detected Probable Cause The Vertical Scrolling Registers are defective The High Address Adder is defective The Character Generator the Input Latch or the Output Latch is defective The Character Parallel To Serial Con verter is defective Action Suspect the Vertical Scrolling Registers A12U185 and U285 Suspect the High Address Adder A12U190 and U290 Suspect the Character ROM A12U130 the Character Generators A12U230 and U235 the Input Latch A12U140 or the Output Latch A12U225 Suspect the Character Parallel To Serial Converter A12U425 8 57 Troubleshooting and Repair 1241 Addendum 82 828 420jq 1621 be 8 N u31NnO2 H31Syti MTINI HNIJYQINYGA 0 1 2 3150 0090 tye ale HHOO A 330 0000 Sgen t Sein 4 1 3
306. ng 132 volts when Line Select is set to 115 V 250 volts when Line Select is set to 230 V Re check the sup plies for the high line setting NOTE If the 1241 power supply does not meet the listed tolerances repair is necessary before starting any adjustment procedures Table 5 4 POWER SUPPLY READINGS 16V 15 0 to 17 75 V 1 0 V max 12 1V 11 40 V to 12 60 V 1 V p p max 12V 11 40 V to 12 60 V 1 V p p max 5V 4 85 V to 5 15 V 100 mV 3 V 1 90 V to 2 10 V 100 mV p p max ref to 5 V 5 4 75 V 5 25 200 mV max 12 11 40 V to 12 60 V 1 V p p max Verification and Adjustment Procedures 1241 Addendum 1A CRT ALIGNMENT ADJUST 1241 TOP VIEW 1241 LEFT SIDE VIEW O ANODE VOLTAGE Figure 5 2 1241 CRT Drive Board adjustment holes 5376 18 Equipment Required adjustment tool oscilloscope e P6015 high voltage probe Adjustment Procedure Because it affects the screen size the high voltage adjustment should be performed before any other CRT adjustments Refer to Figure 5 2 during the adjustment procedure 1 Connect the high voltage probe to the oscilloscope and set the range to 2 V Div 2 Access the CRT Drive Board by removing the CRT drive board bracket Refer to the Dissassembly and Installation Procedures section of this addendum for specific instructions 3 With the instrument power OFF connect the probe ground to the cha
307. normal circumstances the Functionality Checks within these Performance Verification Procedures provide an adequate test of product performance in a less costly less time consuming manner Adjustment Procedures These procedures describe the steps used by a technician for adjusting the 1241 to meet product specifications If the instrument does not meet the product specifications repair is necessary Table 5 1 REQUIRED TEST EQUIPMENT Equipment Specification Equivalent Tektronix Instrument Or Part 2 channel oscilloscope 300 MHz 485 with two P6106 s with two 1 meter probes Acquisition Probes with P6460 2 short lead sets 2 grounds High Voltage Probe 20 kV max P6015 Universal Counter Timer 200 MHz DC 5010 w P6125 with 5X probe Digital Multimeter 4 5 digit 0 0596 dc DM 501A volts accuracy Pulse Generator 250 MHz pulse rate PG 502 variable output levels Mainframe optional 6 plug in compartments TM 5006 for TM5000 equipment Verification and Adjustment Procedures 1241 Addendum 5 2 Table 5 1 cont REQUIRED TEST EQUIPMENT Specification 500 VA 5A sec 50 11796 Equipment Variable Transformer Service Maintenance Kit Setup Hold Time Test Fixture w lead sets 8 inch cable Coaxial Cables 50 2 50 2 Termination BNC DC Block BNC Probe Adapter BNC T Connector BNC Female to Female Adjustment Tool hex and siot heads Dual Lead Adaptor scope probe accessory See V amp A section for
308. ns 5 8 5 2 1241 CRT Drive Board adjustment holes 5 13 5 3 Soft key adjustment pattern 5 15 5 4 Expanded view of the Display Board shows components used in the Counter Ag USU o eI a ewe oat 5 16 5 5 Expanded view of the CRT Drive Board shows components used in the External dereie hee Shacks 5 18 6 1 Location of screws for CRT Board bracket removal 6 4 6 2 Discharging a CRT using a flat blade screwdriver 6 6 8 1 1241 Power Supply troubleshooting tree 8 7 8 2 1241 CRT Drive Board troubleshooting tree 8 11 8 3 A13TP225 HDRIVE L A13TP456 horizontal flyback 8 21 8 4 A13TP340 Q534 gate drive A13TP456 horizontal flyback 8 21 8 5 A13TP340 0534 gate drive A13TP534 transformer flyback 8 21 8 6 A13TP344 Q334 gate drive A13TP340 0534 gate drive 8 22 8 7 A13U218 4 sawtooth input AT3TP225 HDRIVE L 8 22 8 8 A13TP223 horizontal oscillator AT3TP225 HDRIVE L 8 22 8 9 A13TP650 cathode Z axis amplifier A13TP225 HDRIVE L 8 23 8 10 13 200 1 and J200 2 color shutter drive A13TP148 vertical flyback 8 23 8 11 A13J200 3 color shutter drive A13TP148 vertical flyback
309. oard assembly A22 should be used with the 9 and 18 channel acquisition boards Both extenders allow a board under test to be at a convenient position away from the other boards so that the signal test points and components are accessible NOTE In some instances extender boards degrade system performance For complete details refer to Table 2 4 in the Specifications section of this manual and to the instruction sheet that accompanies each extender board REPLACING DEFECTIVE PARTS If it becomes necessary to replace defective parts found during troubleshooting procedures refer to the Maintenance section of this manual for cautionary guidelines and recommended practices Note that replacement of instrument electrical components may necessitate readjustment of the affected circuitry Refer to the Verification and Adjustment Procedures section for readjustment procedures LIST OF ASSEMBLIES A list of assemblies and subassemblies can be found at the beginning of the Replaceable Electrical Parts section The assemblies are listed in numerical order A complete component number is useful for identifying the assembly where the part resides and the circuit number being referenced TROUBLESHOOTING PRECAUTIONS To gain access to the interior of the instrument use the directions provided in the Disassembly and Installation Procedures section Electric shock hazards inside the instrument may be exposed when certain covers are removed Servicin
310. occur In this case the 60 Hz interrupt did not occur and the diagnostic test was not run Probable Cause Action The 60 Hz interrupt is not working Run the I O Processor s INTERRUPT area diagnostic correctly test to determine why the interrupt is not working Since the I O INTERRUPT has already been run before reaching this point the failure is probably intermittent Looping on the interrupt test may help in finding the error 3421 Error Index Explanation The reverse video space character could not be read back Probable Cause Action The 19 6 MHz clock or the Clock Divid Check the 19 6 MHz clock at pin 4 on A12U495 Check er is not working the output frequencies of the Clock Divider A12U485 Suspect A12U495 or U485 The generated character was not Suspect the Video Generator A12U235 and 1230 correct The 9 8 MHz inversion circuitry is not Suspect A12U305 or U420 working 3422 Error index Explanation The reverse video space character could not be read back Probable Cause Action The 9 8 MHz inversion circuitry is not Suspect A12U305 or U420 working Troubleshooting and Repair 1241 Addendum 08 8 5 490 q 1921 92 8 5 00 ss L 6 GNE 3333 0003 eo ie 100x201 dO Srin O3u 333Q 009Q euin nin IHON
311. ock rates 9 8 MHz H 4 8 MHz H 2 4 MHz H and 1 2 MHz H The 4 8 MHZ H and the 2 4 MHz H signals are inverted to produce 4 8 MHz L and 2 4 MHz L signals Theory of Operation 1241 Addendum SELECT LOGIC lt gt Memory locations 000 FFFFnex are bank switched between the COMM Pack and Display circuitries The I O Processor uses the CROM L signal to access these locations The bank Switching is controlled by the I OP data bit ID3 input to the Control Register A12U420 If ID3 is low the display circuitry will be accessed If ID3 is high the CSYNC CROM L signal will be active and the COMM Pack will be accessed R W CONTROL The I O Processor Control circuitry generates control signals for several operations BUF L OE L LOE L LCP H and IOP LOCKOUT H control data transmission between the Display RAMs A12U145 U245 and the I OP Display RAM Interface A12U155 and U255 VSEL L enables the Vertical Scrolling Registers A12U185 and U285 HSEL L enables the Horizontal Scrolling Registers A12U195 and U295 WAIT CIRCUIT The Wait Circuit monitors the I O Processor s IRD L read signal IWR L write signal and DRAM H display memory signals in combination with the Display Board s 2 4 MHz L signal to determine when the I O Processor should access Display RAM For more information on accessing Display RAM refer to Display RAM and Address Multiplexing The circuit produces LCP L and LO
312. omponents Servicing static sensitive assemblies should be performed only in a static free work station by qualified service personnel Maintenance 1241 Addendum Nothing capable of generating or holding a static charge should be allowed on the work station surface Keep the component leads shorted together whenever possible Pick up components by the body never by the leads Do slide the components over any surface Avoid handling components in areas that have a floor or work surface covering capable of generating a static charge Use a soldering iron that is connected to earth ground 4 Use only special anti static suction type or wick type desoldering tools NOTE Damage to electrical components may not be immediately apparent Always follow the precautionary measures described when handling static sensitive components PREVENTIVE MAINTENANCE Preventive maintenance consists of periodic Cleaning and inspection Accumulation of dust on electrical components acts as an insulating blanket and prevents efficient heat dissipation This condition can cause overheating and component breakdown within the instrument Dust accumu lated on parts around the display screen can render the on screen soft keys inoperative refer to Soft Key LED Cleaning later in this section Periodic cleaning and inspection will reduce instrument breakdown and increase instrument reliability This instrument should be cleaned as ofte
313. ope e variable transformer Check Procedure 1 Perform procedures 1 and 3 cabinet removal and card cage roll of the Disassembly and In stallation Procedures section of this manual 2 Locate the set of square pins labeled J658 on the Interface Board Figure 5 1 This set of sup ply pins should be used as the reference point for all power supply measurements 3 Setthe variable transformer for the appropriate low line voltage setting 90 volts when Line Se lect is set to 115 V 180 volts when Line Select is set to 230 V 4 Check all power supplies for correct voltages using a DMM on the appropriate dc volts scale The power supply may be in either the high load setup A07J444 pin 1 shorted to pin 2 or the low load setup A07J444 pin 2 shorted to pin 3 The jumper should be positioned in the low load setup when two acquisition cards either 9 channel or 18 channel are installed If more than two 9 or 18 channel cards are installed the jumper should be positioned in the high load setup Refer to Table 5 4 for tolerances NOTE The 3 volt supply should be measured with reference to the 5 volt supply 5 11 Verification and Adjustment Procedures 1241 Addendum 5 12 9 Check all power supplies for ripple using an oscilloscope set at 0 1 V Div 5 ms Div AC input coupling and 20 MHZ bandwidth limit ON Refer to Table 5 4 for tolerances 6 Reset the variable transformer output for the appropriate high line voltage setti
314. operation 230 Vac operation 12 V supply regulation rippie rated current limit point 16 V supply regulation ripple rated current limit point REV AUG 1986 Table 2 1 cont 2 12 MHz 2 or 6 MHz 8 or 12 ns 0 5 ns 350 mV min about V th t ns 1 50 ns max 166 7 ns 2 or T x 2 6 5 ns 1 0 ns 300 mV min about V th 5 11 4 V min 12 6 V max 1 V p p max 15 0 min 17 75 V max 1 0 V p p max Specifications 1241 Addendum 1241 ELECTRICAL SPECIFICATIONS Performance Requirements Supplemental information See Figure 2 2 Timebase T1 is specified in the Timebase menu The TPG clock output is only valid when T1 is 50 MHz 8 or 12 ns depending on strap A14J510 12 ns pins 1 2 or 8 ns pins 2 3 Vth 5V measured 1 30 V Nominal V th 3 70 V 1 5ns See Figure 2 2 Vth 5V measured 1 30 V Nominal V th 3 70 V 500 VA max 7 A max 48 Hz to 63 Hz single phase 90 V to 132 V 180 V to 250 V This supply is used by all of the instrument except the CRT Drive and the COMM Pack port Measured on the Interface Bd Measured on the Interface Bd 0 A min 1 A max each 1 0 A min 2 5 A max This supply is used by the CRT Drive Measured on the interface Bd Measured on the Interface Bd 0 A min 3 5 A max Supply is fused on the CRT Drive Bd with a 5 A fast blow fuse Specifications 1241 Addendum Clo
315. ottom line 25 of the display screen s scrolling area thus defining the vertical scrolling window 4 13 Theory of Operation 1241 Addendum 4 14 The High Address Adder A12U190 and U290 combines any offset value latched by the Vertical Scrolling Registers with the current raster count to form an 8 bit word The upper five bits U6 U10 are the Display RAM s A6 A10 address bits The three least significant bits LO L2 indicate which of the eight raster lines of a character row is being displayed The output of the High Address Adder shifts the information on display lines 11 through 25 up or down to produce vertical scrolling The A12U480 output signal RGLATCH H is used by A12U105 to produce VLATCH H The Processor uses VLATCH H during diagnostics when it reads back from the diagnostic window HORIZONTAL SCROLLING CONTROL lt gt Horizontal scrolling is performed only in timing or graticule mode The Display RAM s 0 5 address bits determine which of the 64 characters comprising a screen line is being accessed in memory The value of these bits is determined by the offset value contained in the Horizontal scrolling Registers A12U195 and U295 and by the Character Counter formed by A12U198 and U298 While in timing or graticule mode the information on any line may be shifted left or right by changing the values in the Horizontal Scrolling Registers Only information on lines 11 25 can be horizontally scrolled because system
316. ounter timer trigger is within one stored clock of event causing trigger Changes from 30 ns to 35 ns 1240D1 GLITCHES OFF 20 ns 1240D1 GLITCHES ON 22ns Extender adds 5 ns to both minimum delays between phases T2F T2L phase delay increases from 10 ns to 15 ns T2L T2F phase delay increases from 20 ns to 25 ns Two timebase sequentia triggering is not guaranteed for timebases that are asychronous to each other Refer to the extender board instructions in Section 5 for more information 2 13 Specifications 1241 Addendum 2 14 Table 2 5 1241 ENVIRONMENTAL SPECIFICATIONS Characteristic TEMPERATURE Maximum operating Minimum operating Non operating TPG calibrated operating HUMIDITY ALTITUDE Operating Non operating VIBRATION operating Displacement Frequency range SHOCK Characteristic WEIGHT OVERALL DIMENSIONS Height handle folded back Width including handie Length including protective front cover Length handle extended Description 50 122 F 0 C 32 F 55 C to 75 C 67 F to 167 F 20 C to 30 C 68 F to 86 F 90 to 95 relative humidity Five 24 hr cycles at 30 C to 60 C instrument must reside in lt 70 relative humidity for two hours before and during operation 4 5 km 15 000 ft 15 km 50 000 ft 0 64 mm 0 025 inch 10 to 55 Hz 30 Gs halfsine 11 ms duration 18 shocks total 3 on each face Table 2 6 1241 PHYSICAL SPECIFICA
317. ption No Part Number Effect Discont Qty p Code Mfr Part Number ATTACHING PARTS SCREW MACHINE 2 56 X 0 188 PNH STL END ATTACHING PARTS SUBPANEL FRONT ATTACHING PARTS SCREW 4 40 X 0 25 100 DEG STL END ATTACHING PARTS FRAME PNL CHAS FRONT ALUMINUM ATTACHING PARTS SCREW 4 40 X 0 25 FLH 100 DEG STL SCREW MACHINE 6 32 X 0 250 PNH STL END ATTACHING PARTS GUIDE BOARD 5 5 745 L ATTACHING PARTS SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL END ATTACHING PARTS SHIELD CKT BD LEXAN SHIELD ELEC CABLE ATTACHING PARTS SCR ASSEM WSHR 4 40 X 0 25 PNH STL POZ END ATTACHING PARTS 0 127 ID X 0 6 OD X 0 375 H SETSCREW 5 40 X 0 125 STL PANEL REAR BRACKET FAN ALUMINUM ATTACHING PARTS SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL END ATTACHING PARTS FAN TUBEAXIAL 14 5VDC 3200RPM 106CFM NUT PL ASSEM WA 4 40 X 0 25 STL CD PL ATTACHING PARTS SCREW MACHINE 4 40 X 0 625 FLH 100 DEG STL END ATTACHING PARTS HOLDER CKT BD ALUMINUM ATTACHING PARTS SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL END ATTACHING PARTS HINGE BUTT 2 0 L X 1 5 W ALUMINUM ATTACHING PARTS SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL END ATTACHING PARTS PAD CUSHIONING 13 76 X 0 67 X 0 188 RUBBER NUT PL ASSEM WA 4 40 X 0 25 STL CD PL MARKER IDENT MARKED GROUND SYMBOL ANAL
318. rification and Adjustment Procedures 1241 Addendum The performance requirements given in tables of the Specifications section are the minimum necessary to produce accurate results Therefore the related equipment must meet or exceed the listed specifications Detailed instructions for operating the test equipment are not offered in this manual operating instructions are required refer to the specific test equipment manual Equipment Alternatives When substituting equipment for the recommended test equipment control settings or adjustment setups may need to be altered If the exact equipment listed in Table 5 1 is not available check the minimum specification column carefully to see if other equipment will suffice ADJUSTMENT INTERVAL To ensure correct instrument operation adjustment should be checked every 5000 hours of operation or once every year if used infrequently Before performing the adjustment procedures perform preventive maintenance as outlined in the Maintenance section TEST SEQUENCE Before starting any of the 1241 adjustment procedures perform the Pre Adjustment Procedure Once complete perform the subsequent adjustment procedures in any order Sequential order is recommended when performing all the adjustment procedures If an adjustment procedure has more than one part e g 1A and 1B perform ali parts of the procedure PRE ADJUSTMENT PROCEDURE Equipment Required e digital multimeter test oscillosc
319. riving the raster scan CRT and the Liquid Crystal Color Shutter LCCS Video and sync signals from the Display Board are used in generating the Z Axis and sweep signals the LCCS driver signals and the grid bias voltages for the CRT In addition to these basic monitor functions the CRT Drive Board circuitry supports rear panel functions such as trigger in out buffering contrast control and a COMM communication pack interface Theory of Operation 1241 Addendum 4 8 VERTICAL SWEEP CIRCUIT lt gt The vertical processor A13U241 generates the sweep current for the vertical deflection yoke The vertical processor includes an oscillator a voltage ramp generator a high gain amplifier and a flyback generator This processor and associated circuitry provide vertical sweep synchronization vertical height deflection and vertical linearity A13U138 uses the signal VDRIVE GREEN H from the Display Board to generate the 120 Hz TTL level signal VDRIVE H The vertical processor A13U241 synchronizes to VDRIVE The amplifier output at A13U241 4 provides the vertical yoke sweep current During the vertical sweep capacitor A13C247 charges to approximately 16 volts When the sweep reaches the bottom of the screen the stored charge is internally added to the 16 volt power supply This produces a 32 volt flyback signal that causes the vertical deflection beam to return the top of the screen The vertical size control A13R160 adjusts
320. rm the CRT socket to J548 one wire from the CRT socket to the ground lug flat laminated cable from the interface Board to J470 three wire cable from rear panel to J675 wire cable from the Rear Panel to A13U189 1 N Brown wire from the CRT Drive Board to the ground lug 9 4 White Yellow wire from EXT TRIG IN to J187 9 N White wire from EXT TRIG OUT to J288 two wire cable from the CRT Yoke to J464 10 two wire cable from the CRT Yoke to J265 11 four wire cable from the Color Shutter to J200 D N 6 6 1986 SECTION SECTION 7 MAINTENANCE INTRODUCTION MAINTENANCE TOOLS REQUIRED FOR MAINTENANCE MAINTENANCE PRECAUTIONS Soldering Light Emitting Diodes LEDs Static Precautions PREVENTIVE MAINTENANCE Exterior Cleaning Interior Cleaning Cleaning Guidelines Inspection CORRECTIVE MAINTENANCE t a 3 B a a b y 88 a m m m 99 c a 8 B8 8 QQ 4 lt n m 5 h 7 1 7 2 7 2 7 2 7 2 7 3 7 4 7 4 7 5 7 5 Section 7 1241 Service Addendum MAINTENANCE INTRODUCTION This section contains preventive maintenance instructions for the 1241 Logic Analyzer Corrective maintenance for the 1241 is identical to that of the 1240 refer to the 1240 1241 Logic Analyzer Ser vice Manual T
321. rrent flows out of A130455 Current flows into A13Q455 during the second half of the sweep When the video beam is at its maximum deflection the drive signal turns Q455 off causing Q455 s drain to fly up to approximately 350 volts This is the horizontal flyback signal The current in the horizontal deflection coils quickly ramps thus causing the horizontal deflection beam to return to the left side of the screen Horizontal linearity is controlled by a fixed capacitor A13C560 and by a current controlled variable inductor A13L453 The horizontal width control mounted on the deflection yoke controls the amount of horizontal deflection by varying the magnitude of the sweep current The horizontal sync control A13R220 is part of an RC timing circuit that produces an exponential voltage at pin 7 of the horizontal processor A13U218 Adjusting the horizontal frequency to approximately 31 5 KHz causes horizontal synchronization to occur The horizontal position control A13R222 causes a phase shift between the HDRIVE L and the horizontal flyback signals thus changing the horizontal position of the display Theory of 1241 Addendum HIGH VOLTAGE GRID VOLTAGE GENERATION 12 kV CRT anode voltage and the grid bias voltages are generated by the flyback transformer A13T512 When transistor A13Q534 is turned off the primary of the flyback transformer flys up to a nominal 400 volts The anode and grid voltages are generated through
322. rsor and highlight information If FD is detected while the display is in character mode the C1 H and TMODE H signals take on the appropriate values refer to Table 4 1 to enter graticule mode This mode is used to draw the graticule used in the timing diagram display The display is reset to character mode after each raster Table 4 1 DISPLAY MODE TRUTH TABLE DISPLAY MODE Character Mode Red Timing Mode Graticule Mode Green Timing Mode Character ROM A12U130 is a 4K X 8 bit EPROM The ROM is divided into two halves The lower half locations 000 7FF rex contains 128 word character set The upper half locations 800 FF Frex contains encoded cursor and highlight information When the display is in timing mode timing diagram data from the Display RAMs bypasses the Character ROM and is presented directly to the PALs on the falling edge of the 2 4 MHz L clock Data presented to the Character ROM on the rising edge of the 2 4 MHz L clock is interpreted as cursor and highlighting information The Character ROM decodes cursor and timing information for the PALs Cursor information is presented to the Character ROM during the time frame when red information is being written to the screen Highlighting information is presented during the green frame The PALs further decode the timing cursor and highlighting information to generate the display pixel signals The 8 bit word output from the Pa
323. rt Name amp Description Code Mfr Part Number AL5R380 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w AL5R381 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w 158382 315 0511 00 RES FXD FILM 510 5 0 25 19701 510 5 0 25w AL5R383 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 5 0 25w AL5R384 315 0103 00 RES FXD FILM 10K OHM 5 0 25W 19701 10K 5 0 25w AL5R385 307 0539 00 RES NTWK FXD FI 7 510 OHM 102 1W 91637 MSPO8A01 511K OR G O Al 58395 315 0511 00 RES FXD F1LM 510 OHM 52 0 25W 19701 510 5 0 25w AL5R397 315 0511 00 RES FXD FILM 510 OHM 5 0 25W 19701 510 5 0 25w AL5R400 307 0486 00 RES 100 OHM 20 1 125W 91637 5 10 01 101 OR G C AL5R401 315 0101 00 RES FILM 100 0HM 52 0 25W 57668 100 5 0 25w AL5R415 315 0101 00 RES 100 OHM 52 0 25W 5 668 100 5 0 25w 5430 307 0489 00 RES NTWK FXD FT 7 100 20 1 04 91637 MSPOBA 0 101J OR G AL5R437 317 0151 00 RES FXD CMPSN 150 0HM 52 0 125W 01121 150 5 0 125w AL5R442 307 0488 00 RES NTWK FXD FI 5 100 0HM 202 0 75W 91637 MSP06A01 1D1G OR CSC AL5R456 307 0488 00 RES NTWK FXD FI 5 100 0HM 202 0 75W 91637 MSPO6A01 1D1G OR CSC A15R475 307 0503 00 RES 9 510 20 0 125 91637 MSP10A01 511G OR CSC AL5R480 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 52 0 25w AL5R482 315 0511 00 RES FXD FILM 510 0HM 52 0 25W 19701 510 52 0 25w AL5R485 307 0503 00 RES NTWK FXD FI 9 51
324. s RENAE 401 eon C410 ai TP421 NC C408 n caw ORES De 5378 61 Figure 10 3 07 1241 Power Supply Board Component Locations Table 10 4 1241 POWER SUPPLY ASSEMBLY A07 CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD CIRCUIT SCHEMATIC BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION C101 Al 1 R372 C3 E3 C121 C2 1 R373 C4 E3 C122 C2 B1 R374 C2 F3 C131 C2 C1 R375 C4 F3 C161 F3 1 R376 C3 E3 C165 E5 E2 R377 C4 E3 C171 E4 1 R378 E3 E3 C172 5 1 R381 B3 F3 C173 1 EZ R383 C4 F3 C181 F3 F1 R384 E4 F3 C187 2 1 R385 C3 F3 C188 F2 1 R386 DS F3 C189 A3 F2 R387 DS F3 C210 Al A2 R388 DS F3 C211 B2 A2 R389 05 212 C2 A2 R390 DS F3 C274 D4 F2 R440 D2 C3 C276 D3 F2 R441 D2 C3 C278 D3 E3 R461 05 4 279 D3 F3 R462 D4 E3 C281 B4 F2 R471 C2 E4 C282 B3 2 R472 C2 E4 C284 F2 F2 R473 C3 E3 C285 F1 F2 R474 B3 F4 C321 D2 B3 R481 C3 F3 C322 D2 B3 R483 B3 F4 C325 D2 B3 R484 F2 F4 C361 E2 D3 R485 E4 F4 C362 E3 E3 R487 C4 F3 C364 C4 E3 RT271 D4 E2 C371 B4 E3 RT311 A2 B3 C372 C3 E3 RV221 B2 B2 C378 C3 F3 RV224 A1 B1 C379 C4 E3 RV401 B1 A4 C383 C3 F3 S100 A2 A1 C384 C4 F3 S401 B1 A3 C385 E4 F3 T111 A1 B1 C386 B5 F3 T141 B2 C1 C387 D5 F3 T211 C2 B2 C408 B1 4 T241 D2
325. s an error and the test is aborted This sequence is repeated for each RAM location under test After this pass all of the RAM under test should contain OF rex The last pass of the test reads each location of the RAM under test in reverse order starting with the last location If any location does not contain OF nex the value read is reported as an error and the test is aborted Before exiting the test the screen data that was saved in system RAM is restored to the display RAMs 3111 Error Index Troubleshooting and Repair 1241 Addendum Explanation The data read back was not correct Probable Cause The direct memory access synchroniz ing circuitry is not working correctly The 19 6 MHz clock or clock divider is not working correctly Bad Green Display RAM The Display RAM Read Buffer or the Write Latch is defective The Display RAM Address Multiplexer is not working correctly One or more of the 8 data lines from the Green Display RAM to the Display RAM Read Write Latch may be open or shorted together One or more of the 11 address lines from the Display RAM Address Multi plexer to the Green Display RAM may be open or shorted together Action Loop on the RAM test and verify that the WAIT L signal is being generated when the I O Processor ac cesses the Display RAM Check that the Write Enable signal BUF L and the RAM data output latch control signals LCP and LOE L are occurring If any of the signals
326. s is that the following components are not present in the 1241 supply U472 VR489 and R488 Refer to 670 7534 06 Power Supply Theory in the 1240 1241 Service Manual OVER VOLTAGE PROTECTION FRONT PANEL POWER SWITCH FRONT PANEL MAIN T START ue SWITCH CIRCUIT 7 3 TERMINAL REGULATORS L SECONDARY RECTIFIER RECTIFIER ANE CIRCUIT AND FILTER FILTER 3 VOLT SUPPLY Figure 4 5 1241 Power Supply Board functional block diagram AC LINE INPUT 4 6 12V 12V 5V 16V i 5V 5378 08 FROM DISPLAY BOARD VDRIVE GREEN H FROM DISPLAY BOARD FROM FROM TRIGGER BOARD Theory of Operation 1241 Addendum VERTICAL VERTICAL YOKE DRIVE SWEEP CIRCUIT TO REAR PANEL CONTRAST CONTROL VIDEO CATHODE Z AXIS AMPLIFIER BRIGHTNESS CONTROL HIGH VOLTAGE GRID VOLTAGE GENERATION COLOR SHUTTER T 4 2 fh COLOR CRT DAG SPRING FEEDBACK CONTROL LOOP HORIZONTAL YOKE DRIVE HORIZONTAL SWEEP CIRCUIT am YSTAL COLOR LCCS DRIVE SHUTTER DRIVE TO REAR PANEL TRIG OUT H TRIG OUT TRIGGER OUT LEVEL SHIFT AND BUFFER REAR PANEL TRIGGER IN TRIG IN TRIG IN H TRIGGER BOARD x10 LEVEL SHIFT AND BUFFER M TO FRO COMM PACK PORT MAIN INTERFACE COMM PACK PORT 5378 09 Figure 4 6 CRT Drive Board functional block diagram CRT DRIVE BOARD THEORY OVERVIEW The CRT Drive Board holds circuitry necessary for d
327. s out of tolerance the amount of delay through A12W440 should be changed by restrapping W440 Before restrapping power down the instrument Note the current delay strapping on A12W440 If no restrapping has been previously performed W440 will have circuit board runs that strap for a nominal 2 0 ns of added delay If W440 has been previously restrapped compare the strapping connections to those shown in the table to find the current delay setting ADDED W440 DELAY STRAPPING 0 0 ns 1 8 0 5 ns 1 4 amp 5 8 1 0 ns 1 6 amp 7 8 1 5 ns 1 2 amp 3 8 2 0 ns nominal set 1 2 amp 3 4 amp 5 8 2 5 ns 1 2 amp 3 6 amp 7 8 3 0 ns 1 2 amp 3 4 amp 5 6 amp 7 8 If the delay measured in step 6 was less than 2 0 ns restrap W440 from the current setting to increase the delay by 0 5 ns If the delay measured in step 6 was more than 3 0 ns restrap W440 from the current setting to decrease the delay by 0 5 ns Find the desired delay value and corresponding strapping information in the strapping table To restrap first disconnect the undesired current strapping connections by unsoldering W440 strapping wires or cutting circuit board runs on W440 Then use 26 guage wire to restrap W440 for the desired new delay setting determined in step 8 10 After restrapping is complete repeat step 6 to verify that the delay is within tolerance 5 17 Verification and Adjustment Procedures 1241 Addendum 5 18 6 CRT DRIVE BOARD EXTERNAL
328. scription Code Mfr Part Number Al CIRQUIT BD ASSY PT 1 NOT AVAIABLE ORDER 672 1130 00 M2 CIRCUIT BD ASSY PT 2 NOT AVAIABLE ORDER 672 1130 00 CIRCUIT BD ASSY LED 1 NOT AVAIABLE ORDER 672 1130 00 MA CIRCUIT BD ASSY LED 2 NOT AVAIABLE ORDER 672 1130 00 A05 670 7529 00 CIRCUIT BD ASSY KEYBOARD 80009 670 7529 00 7 670 7534 15 BD ASSY PWR SPLY 80009 670 7534 15 670 7528 07 CIRQUIT BD ASSY INTERFACE 80009 670 7528 07 A 9 670 7527 15 CIRCUIT BD ASSY CONTROL PROCESSOR 80009 670 7527 15 0 670 7526 15 8010100 8010323 CIRCUIT BD ASSY 1 0 PROCESSOR 80009 670 7526 15 10 670 7526 16 010324 CIROUIT BD ASSY I O PROCESSOR 80009 670 7526 16 12 670 8689 00 8010100 010483 CIRQUIT BD ASSY DISPLAY 80009 670 8689 00 Al2 670 8689 01 8010484 011626 CIRCUIT BD ASSY DISPLAY 80009 6 0 8689 01 Al2 670 8689 02 011627 CIRCUIT ASSY DISPLAY 80009 670 8689 02 A3 670 8688 00 B010100 B010127 BD ASSY CRT DRIVE 80009 670 8688 00 A3 670 8688 01 B010128 010182 CIRQUIT ASSY CRT DRIVE 80009 6 0 8688 01 A3 670 8688 02 010183 8010540 CIRCUIT BD ASSY CRT DRIVE 80009 670 8688 02 A3 670 8688 03 B010541 CIRCUIT BD ASSY CRT DRIVE 80009 670 8688 03 Al4 670 7523 10 010100 8010883 CIRCUIT BD ASSY TRIGGER 80009 670 7523 10 Al4 670 7523 11 1 0884 CIRQUIT ASSY TRIGGER 80009 670 7523 11 A5 670 7524 09 CIRCUIT BD ASSY 9 CHAN ACQ 80009 670 7524 09 124001 ONLY Al6 670 7703 07 C
329. scriptions in this section divide each board into functional blocks When reading these descriptions refer to the system block diagram the functional block diagram and the schematics The circuit descriptions also provide schematic diamond numbers that reference the appropriate schematic LOGIC CONVENTIONS Digital logic techniques are used to perform most functions within this instrument Function and Op eration of the logic circuits are represented by standard logic symbols and terms All logic functions are described using the positive logic convention Positive logic is a system of notation whereby the more positive of two levels is the true or 1 state and the more negative level is the false or 0 state In logic descriptions the more positive of the two logic voltages is referred to as high and the more negative state as low The specific voltages that constitute a high or low state vary between different electronic devices e g ECL logic and TTL logic Active low signals are indicated by L following the signal name or by a horizontal line above the signal name e g IRQ Signal names without indicators are considered active high Some active high signals are indicated by an H following the signal name Theory of Operation 1241 Addendum GENERAL SYSTEM DESCRIPTION USER S CONFIGURATION CHOICES CONTROL PROCESSOR BOARD RAW DATA AND CORRELATION INFORMATION ROM RAM PACKS ACQUISITION BOARDS 9 CHANNEL DIAGNOS
330. software allows the display to enter timing or graticule mode only when these lines are being output TOP OF MEMORY 64 BYTE BLOCK OF CURSOR AND HIGHLIGHT DATA LINE 1 LINE 26 LINE 30 CHARACTER DATA LINE 25 FFER 64 BYTE BLOCK OF BUFFER SPACE LINE 20 BOTTOM OF MEMORY CHARACTER DATA Figure 4 9 Display RAM memory map Theory of Operation 1241 Addendum DISPLAY RAM AND ADDRESS MULTIPLEXING lt gt The Display RAM consists of two 2K X 8 bit 6116 type RAMs One RAM A12U245 contains information to be displayed in red The other RAM A12U145 contains information to be displayed in green Information to be displayed in yellow is stored at the same location in both the red and the green RAMs The state of the signal VDRIVE GREEN H determines whether the green or the red RAM is selected When VDRIVE GREEN H is high the green RAM is selected Red RAM is selected when the signal is low The Display RAM provides temporary storage for five types of data character data timing glitch data timing mode highlighting data timing cursor position data and graticule data Each of the 30 screen lines can be referenced to one 64 byte block of Display RAM refer to Figure 4 9 The two remaining 64 byte blocks are used during scrolling operations and cursor highlighting operations The Display RAM is accessed according to a 400 ns per character cycle time depending on whether the display is in character or timing mode ref
331. ssis 13 Verification and Adjustment Procedures 1241 Addendum 5 14 10 11 12 13 14 15 16 Touch the probe tip to the anode connector located under the anode cup the back of the CRT Make sure that the anode connector still fits tightly in the hole Power up the 1241 and check that the high voltage is 12 V 0 6 1000x attenuation If necessary adjust the Anode Voltage Adjustment A13R325 to bring the high voltage into specified limits Power down the 1241 remove the probe and replace the CRT drive board bracket Access the diagnostic tests by holding down any front panel key while powering up the 1241 The tests initially indicate a keyboard failure due to the key being held down Adjust the Contrast control on the rear panel to a desired brightness level While in the Main Diagnostic menu select the FRONTPANEL module Touch the Module Diagnostic soft key and select the FP VERIFY area Touch the Area Diagnostic soft key and se lect routine number 2 Press the START key The pattern shown in Figure 5 3 will be displayed If necessary adjust the Horizontal Sync A13R220 and or the Vertical Sync A13R161 to get a stable display Allow 15 minutes for CRT warm up If the pattern on the screen does not look square perform the remainder of the steps in this procedure If the pattern on the screen looks square continue with 7B CRT Soft Key Sensitivity Adjust located in the 1240 1241 Logic Anal
332. stic Specifications 1241 Addendum Characteristic SAFETY General CRT GLOBAL EVENT Filter global event UNCLOCKED Separate 1240D1 and 1240D2 events When 1 Min guaranteed event accepted When N 2 16 Max guaranteed event rejected Min guaranteed event accepted Mixed 1240D1 and 1240D2 events Max guaranteed event rejected Min guaranteed event accepted Filter global event CLOCKED Accept 1240D1 and or 1240D2 ciocked events STORE ON ON NOT action 1 event or 2 event T1 event and 2 event Table 2 1 1241 ELECTRICAL SPECIFICATIONS Performance Requirements Timebase period 6 ns N 1 x T 8ns Nx T 2 ns N 1 x T 8ns N x T 20 ns global event clocked Store data if event true for 20 ns or more Store data for a timebase if both events meet indiv timebase spec and the other timebase event is valid for 10 ns after the storage clock Supplemental Information Complies with the requirements of UL 1244 IEC 348 and CSA 556B UL VDE German X radiation law and TEK Standard 062 1860 00 Product Safety Standard for X Radiation Event consists of inputs from all groups An event is not recognized unless it is ac cepted by the global filter These specifica tions are based on a 1241 equipped with P6460 Data Acquisition Probes N is value of FILTER field selections are 1 16 T is value of ON field filter timebase
333. ting buffer accepts ECL level trigger out signals from the Trigger Board and converts them to buffered TTL level signals available at the rear panel TRIG OUT BNC The latched or pulsing trigger out signal to the Trigger Board is useful in triggering or enabling other external instruments A13Q273 and Q277 act together as a differential comparator Components A13Q267 and A13CR272 control saturation of the comparator to maintain fast switching rates A13Q276 supplies the necessary pull down for the TTL level output at the rear panel TRIG OUT BNC 4 10 REV MAY 1986 Theory of Operation 1241 Addendum pigog ejdsig y 01 825 3359 FAIA iO x2 GOT seen 1 PRION LSD S02 GIy 343G 0080 0000 5920 Sren Spin 3 P ACW 9 tes HOWE uJ11YNUO01 AY 14 0 HOw ssin AH 5011 HONS Sur Bit i Spite 19 019 110 O 301A ONOINY tH vun eti ETT 8 Oin I XH Uie XOQOWIO FINALY YO IHING 61 RR HNS 6 I t 3AIUQA I 61 MGONIM 61 6 Ll J g BOS d
334. ugh the window is a special diagnostic character It was selected because it supplies information that identifies which data line is bad in the character generation circuitry or which bit is bad in the scrolling circuitry A graphic representation of the diagnostic character being scrolled horizontally causing a waveform bottom bar character to be formed on an 8 X 8 matrix is shown below Since the test uses line 26 in the Display RAM the contents of the Display RAM are saved in sys tem RAM at location B000 e After saving the contents of the Display RAM line 26 is filled with FFrex This causes the Display Board to select the timing character mode When raster 200 occurs the character location on line 25 is clocked into the diagnostic window The bottom bar character shown above is written to the character location on line 26 that is directly below the character lo cation on line 25 Because the bottom bar character is on character pixel row 2 it is not positioned over raster 200 character line 25 To position it over the correct raster row the character is written to line 26 and vertically scrolled up by seven raster rows The second pixel row of the horizontal bar character is then positioned over the last eight columns of raster row 200 The diagnostic character is scrolled left by writing a sequence of values to the HBIT register at lo Cation C803nex the horizontal scrolling circuitry As the character is scrolled left the
335. w 7 R385 321 0443 00 RES FXD FILM 402K 0HM 12 0 1254 TC TO 91637 CMF55116G40202F A07R386 315 0472 00 RES FXD FILM 4 7K 0HM 52 0 25W 57668 4 00 52 0 25w AY R387 321 0134 00 RES FXD FILM 243 0HM 12 0 125W TC TO 91637 CMF55116G243R0F A07 R388 315 0241 00 RES FXD FILM 240 0HM 52 0 25W 19701 240 5 0 25w A07 R389 315 0102 00 RES FXD FILM 1K OHM 52 0 25W 57668 1000 5 0 25w A07R390 307 0051 00 RES FXD CMPSN 2 7 52 0 5 01121 EB27G5 AD7R440 321 0020 00 i RES FXD FILM 15 8 0HM 12 0 1254 TC TO 91637 CMF55116G15R80F 407R441 321 0041 00 RES FXD FILM 26 1 0HM 12 0 1254 TC TO 91637 CMF55116G26R10F 4078461 308 0757 00 RES FXD WW 0 025 OHM 32 5W 91637 LVRb GRO250H A07 R462 308 0710 00 RES FXD WW 0 27 0HM 52 1W 75042 BW 20 R2700J A07R471 307 0056 00 RES FXD CMPSN 4 3 OHM 52 0 5W 01121 EBA3C5 78472 303 0242 00 RES FXD CMPSN 2 4K OHM 52 1W 91637 2400 5 1 0w AY R473 321 0473 00 RES FXD FILM 825K 0HM 12 0 125W TC TO 91637 CMF55116682502F AD7R474 315 0474 00 RES FILM 470K 52 0 25 19701 470K 5 0 25w 7 81 321 0469 04 FILM 750K OHM 12 125W 2 91637 551160750028 7 R483 315 0122 00 RES FXD FILM 1 2K 5 0 25 57668 1200 52 0 25w AO7 315 0102 00 RES FXD FILM 1K 0HM 52 0 25W 5 668 1000 52 0 25w 7 R485 308 0399 01 RES FXD WW 10 52 5 91637 CW5 10ROJ BULK AQ7R487 315 0152 00 RES FXD FILM 1 5K OHM 52 0 25W 57668 1500 5 0 25w AY RT271 307 0751 00
336. with an over temperature fuse that opens when the internal temperature of the instrument reaches 100 C 212 F If the fuse located on the Interface Board should open in Strument operation will not be possible until the fuse is replaced For replacement part numbers re fer to the Replaceable Electrical Parts section 1241 Power Supply Troubleshooting Trees The 1241 power supply troubleshooting trees should be used when troubleshooting a 1241 power supply The first tree Figure 8 1 points the technician to the correct troubleshooting trees that fol low Each of these trees corresponding to the six failure areas then guide the technician to the problem source The 1241 power supply is similar to the 670 7534 06 version of the 1240 power supply The difference between the two is that the 13 volt line in the 1240 supply is an unregulated 16 volt line in the 1241 START ARE ALL POWER SUPPLY VOLTAGES DEAD NO DO SUPPLY OUTPUTS PULSE YES YES ARE THE 16V AND 12V SUPPLIES O K YES k NO NO Troubleshooting and Repair 1241 Addendum BLOWN REAR PANEL FUSE BLOWN THERMAL FUSE KICKSTART CIRCUIT PROBLEM PRIMARY SWITCHING CIRCUIT PROBLEM OVER VOLTAGE PROTECTION PROBLEM MAIN REGULATOR PROBLEM SECONDARY RECTIFIER FILTER PROBLEM MAIN REGULATOR PROBLEM 3 VOLT SUPPLY PROBLEM 16V OR 12V SUPPLY PROBLEM 5V SUPPLY PROBLEM
337. y is for both operator and service personnel Specific cautions and warnings are found throughout the manual where they apply but may not appear in this summary TERMS iN THIS MANUAL CAUTION statements identify conditions or practices that could result in damage to the equipment or other property WARNING statements identify conditions or practices that could result in personal injury or loss of life TERMS AS MARKED ON EQUIPMENT CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking a hazard to property including the equipment itself DANGER indicates a personal injury hazard immediately accessible as one reads the marking SYMBOLS AS MARKED ON EQUIPMENT DANGER High voltage D Protective ground earth terminal N ATTENTION refer to manual GROUNDING THE PRODUCT This product is intended to operate from a power source that does not apply more than 250 volts rms between the supply conductors or between either supply conductor and ground This product is grounded through the grounding conductor of the power cord To avoid electrical shock plug the power cord into a properly wired receptacle before connecting to the product A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation DANGER ARISING FROM LOSS OF GROUND Upon loss of the protective ground connection all accessible conductive parts including knobs
338. yzer Service Manual Adjust the Horizontal Position A13R222 and the Vertical Position AT3R165 until the cross is in the center of the screen Adjust the Horizontal Linearity A13L453 to make the corner soft keys match all soft key widths should be within 0 02 inches of each other NOTE The soft key boxes in the middle of the screen are normally narrower than the ones at the outer edges Adjust the Horizontal Width Coil located on the deflection yoke of the CRT until the picture is 5 1 inches wide NOTE The horizontal linearity and size controls interact For proper adjustment repeat both adjustments until the display is correct Set the Vertical Linearity Bottom A13R146 at mid range Adjust the Vertical Linearity Top A13R151 to make the top and bottom soft keys match The soft key heights should be within 0 02 inches of each other Adjust the Vertical Size A13R160 until the picture height is 3 7 inches NOTE The Vertical Linearity and size controls interact For proper adjustment repeat both adjustments until the display is correct Continue with adjustment 7B CRT Soft Key Sensitivity Adjust in the 1240 1241 Logic Analyzer Service Manual Verification and Adjustment Procedures 1241 Addendum ES EN ES EN PRESS STOP TO EXIT SS a NE A S SET 5378 16 Figure 5 3 Soft key adjustment pattern 5 15 Verification and Adjustment Procedures 1

1241 LOGIC ANALYZER SERVICE MANUAL

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